> 3) people who adopt someone else's thought-system are effectively admitting they are bad at thinking.
> You can get Leo Messi to teach me football but my first touch will still be sub-par.
Isn't that conflating practice with thinking? You would also never invent football on your own if you'd never heard of it. If you want to be good at football, letting Leo teach you is likely to be a lot faster and produce better results than not learning from anyone.
Everyone adopts thought systems from others, you do and I do. Failing to admit that is to be actually bad at thinking and fail to admit you're human. It's not possible to have only original thoughts, and even if it was, it wouldn't be practical.
Try to be honest with yourself and think about how many things you know for certain, that you weren't taught by someone else. How many facts do you know that you've verified yourself first hand? How do you know the sun is 93 million miles away, or that there are electrons in your CPU? I trust scientists who've studied it and thought about it, I haven't verified those things myself. How do we even understand words and speak languages? As children, we learned everything about the world from others, including how to think.
Isn't this is a feature, not a bug? We learn from each other over time, and we'd be nowhere without people having adopted and then built upon the thought systems of others.