I've been waiting, and you just sprung my trap card. /yugioh
Do you remember how, in Hunter x Hunter, at the end of the initial Hunter Exam Gon squeezed (with a single hand) and broke the arm of one of the strongest characters, Illumi? I remember. He was what, 12? Illumi was late teens or early twenties, and a super assassin? Remember how Nen (potential physical enhancement) was introduced in the very next arc?
Naruto... not again... that is not a great example of what you are advocating... Every single ninja has a baseline of superhuman abilities and endurance gained by simply training- same as BnHA.
Superhuman characteristics are standard in pretty much all shounen stories - most anime for that matter.
I'm starting to feel that, if Hero Academia had been what came out 20 years ago instead, you would be complaining about how this new Naruto garbage isn't living up to the 'greats' of old and fudging what should be humanly possible... You're just old enough to see fiction for what it is, and forcing too much internal logic on an abstraction to begin with is only going to fuel your own inner 'comic book guy'. Are some things silly? Yes. Do a few things not match up to reality, or even try? Oh yeah. But is complaining about that really enriching your enjoyment of... anything?
Surely you have some other commentary, deep down, trying to claw its way out that will spin our heads with your perceptive insights on the metaphorical relationship between the villain losing the hands 'holding himself back' for a power up, or how hero society as a whole and the nature of professional public safety stewardship had a hand in these current conflicts, or maybe who can even safely fight Shigaraki at this point... or maybe the OST is cool sometimes? Whatever it is, I would like to hear about that much more than "This is dumb- see you next week".
Also, as for this concept, I would recommend you read the 'Mashle' manga (also in WsJ)- it's pretty much about 'What if Clark Kent enrolled in Hogwarts'?