You're missing my point. I'm sure you can throw people who don't know how to do tachiwaza however they choose to stand. That someone bent over and stiff-arming is easy for you to throw has little-to-no bearing on whether that throw is easy to do in actual competition against the non-clueless.
The throw isn't easy to do on someone non-clueless, that was my point.
However, I've thrown Judo black belts, in competition, who've attempted to defend my O soto by shifting their hips and legs back. Admittedly recreational black belts, but black belts none the less.
So my point was that sufficient concerted practice under competent supervision will allow you to utilisie the two throws mentioned- O soto and Ippon seoi against a variety of defences, postures and styles of play.
However, you are deeply unlikely to encounter this level of training in your average BJJ club. Hence why I argued they are inappropriate as first throws for BJJ-ers with limited throw practice time and or inclination.
What you said was the equivalent of "I don't know any boxers, but when people stand with their hands up in front of their face I can hit them with uppercuts pretty easily."
I made distinctions between the 'wrestling stance' which in of itself is supposed to stop the throw and an actual wrestler.
Also as Rod1 has pointed out the gi changes things for a wrestler.
As I said in my initial reply to you, from a distance a wrestler is still in his element able to shoot etc... Once grips are established and set he's very much out of his element unless experienced in the gi. The same applies even more so for BJJ-ers who've only been trained in wrestling style takedowns. Once you set grips on them they are even more limited in what they can do and even more outclassed. Thus being easy to throw with whatever of which O soto is a very viable option.
I have done Judo against an American guy who self-identified as being a 'wrestler', but it was only high school and he wasn't much cop. So I just wrote him off as being a recreational practitioner at a low level school. And therefore my ability to throw him not having much bearing on the whole Judo vs wrestling thing. Much the same way as a 3rd XV player at a minor public school might be a 'rugby player' but doesn't mean they are a Tiger's academy graduate.