What I think is that some people cannot learn or do certain things. Not only do you need to have an aptitude for something, you need to have an interest as well. You will never be good at anything you hate or don't enjoy doing.
I used to run into that all the time at work. Inexperienced drivers who could not back their trailer into a dock. Some people I was able to help, others were simply hopeless. No matter what I told them to do, they would do the opposite. They simply had no concept or ability to back into a dock door. This was especially true of foreigners.
Nonsense. I think you might just be a bad teacher.
You just want to whine, argue, and troll.
To deny that people have certain talents that others do not is just foolish.
IF what you claim was true, there would be millions of guitarists equal to Eric Clapton or Jimi Hendrix, millions of brain surgeons, millions of entrepreneurs like Bill Gates or Jeff Bezos and the list goes on.
Do you deny that overall, women score better in languages and worse in mathematics than men? If you do, you're just ignorant.