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> As an example, I do not actually understand why lifting makes me stronger. Why do muscles respond to increased resistance with more strength? Certainly my ankle ligaments didn't respond to injury with more strength. Well, I don't care and it doesn't matter. It will still work.

Maybe you'll get lucky. Or maybe, you'll wish you took the time to understand should you blow a disc in your spine. Is it possible that that you'd learn a bit more about the difference between bodyweight exercises and more than bodyweight exercises, and the requisite amount of care to do the two sustainably long term without incurring risks of debilitating injury?

That’s the magic of form. You don’t need deep understanding, you only need rules. It’ll be fine.

So you need a rule set, you need to take it seriously, you need to pick the right ones (and not accidentally pick the wrong ones or omit the right ones), and if you make a mistake, you can seriously physically injure yourself. Sounds like deep understanding to me; could you be taking it for granted because you've come to a point of mastery such it feels facile?

I'm flattered, naturally :)

But in my case I just paid a guy to tell me what to do until it became automatic habit.

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