I'm just going to qoute your post again because you updated it.
The weight of the shot might be a good reason for why the cross over would be poor, but even with that I doubt it, if you can accelerate a heavy object fast, you can also accelerate a light object fast, perhaps faster since you are used to heavy loads, which is why they get boxers throwing the shot or medicine balls in the 1st place
Trajectory doesn't mean much an uppercut or punching high is pretty simlar level of difference, an uppercut has an even higher trajectory in terms of if you throw it like Tyson he doesnt weight and channels the power almost vertically through the leg so again I think you are wrong on this, and if you are not wrong your reasoning/explanation certainly is
You think he didnt throw that cell phone far because it weighs so much less than a javelin? Its all teh same stuff
Thats a javelin thrower throwing a ball ridiculous speeds you think he couldn't throw a base ball super fast or punch with tremendous force compared to the average boxer? (when all he has done for decades is train power)
Notice he didnt need a run up
Being able to accelerate a heavy object fast doesn't necessarily mean you can accelerate a light object (your hand) fast. The heavier the object, the more your own mass and maximal strength matters. It depends where it is on the force-velocity curve really, but that is a simplification. If they are close and the technique is simular? Sure.
Explosiveness and speed are many things. Technique, power produciton, maximal strength, rate of force development, fiber contraction velocity, inner moment arms, nervous system. These things can attribute to speed and they can all vary from one person to the other, AND, they can fit one task better than another one. It all depends on the requirement of the task.
To illustrate a few differences, look at the videos you posted here with the throwers. Hip turn and leg drive matters greatly, but notice the upper body. The ability to cock your shoulder back (unhindered ROM) and use your other arm as leverage matters just as much. In boxing, they would not be able to punch like that, so they would have to modify it down. Besides the other things that would have to be modified.
No it doesn't there's is about as much difference between modern uppercut mechanics(which doesn't shift weight much) and straight right mechanics as there is between a standing shot put throw and a straight right.
You dont suddenly lose much power if you throw the uppercut for the 1st time after youve mastered the straight right
If you can use kinetic linking the hips and the leg all you have to do is learn the superficial new movements like the arm motion etc and you are at the same level of speed and power for the new motion as you are with the old motion more or less, because its fundamentally the same, its fundamentally hips leg kinetic linking for all these motions, thats it the core of speed and power in all of these sports
As for body type, arm length height shoulder width etc that matters more for throwing than punching, you get hard punchers of all body types but throwers tend to be a bit more uniform, so that is an issue for a heavy hitting boxer trying to cross over into throwing rather than the other way around. But tonnes of boxers have long levers ideal for throwing
I don't agree. If you look at a shotput, they start turning the other way, then making a half turn, having their other arm straight out as leverage, then they spin, transfer the weight, throw the arm forward and up, flick the wrist and keep spinning. It's a very complex technique that takes a lot of time to master. If you take a single segment out of shotput, which would be the weight transfer without the spin, then sure it would lead into punching, but at that point you might as well practice punching, or use another accessory exercise for hip turn.
There would be no benefit to learning the details of shot putting.
The upper body movements are definitely not superficial in boxing, just as they are not superficial in the olympic disciplines. I disagree that it's the same. You trivialising boxing AND throwing technique.
I will concede that there could be a great carryover, but again it is exactly as you say. There are many ways to deliver power in boxing and there are several different types of power punchers. Shotputters might fit into one category of those, with extensive boxing training, but it's hardly reasonable to think that they would automaticly surpass the great hitters in boxing. They might, and they might not, it all depends on how well they adapt to punching something, which does indeed change the mechanics of delivering power. In the end it's a moot discussion really because power in a single punch alone, without other high level qualities, wont get you far at all.
Btw, if what you say is true, then the biggest punchers would automaticly be the best javeling throwers, shot putters and discus throwers. Also, why do you not see the same person at the elite level in all of those?
I can tell you this much, I can punch pretty hard, but I can't throw for shit.