I don't know, man. I know genetics are unfair and shit, but I still think that you can make it to the top through hard work and dedication (and I'm not a basement dweller projecting or anything ahah).
GSP being a prime example of this. I always had the feel he was kinda fragile and not naturally "designed" to fight with his thin skin and everything. I mean I'm quite confident that if a kid version of him fought me at the same age, I would have been able to bully him, like plenty of others apparently did. Dude is now on every single list of top 3 goats in the world and a retired version of him would tear the current me a new asshole within seconds.
There are other examples of somewhat soft guys who made it through hard work, like Bisping or Maia. Technique and dedication are important, I feel like you're being a little too fatalistic here