Does it not? When you 'cure' the lateness you lose the superpower too. Now you have another boring normie doing a workmanlike job.
I think the reason for the animosity is the assumption that it is it a disease or disorder in the first place. It presumes that rather than being different, it is wrong.
Perhaps what is wrong, is neurotypical people insisting that the more gifted people have to be bent and twisted and forced to conform to the world as they want it. Perhaps because their boring and unimaginative minds can't stand the idea that someone else could lead a different life to them. Or, and have heard this, they are annoyed that the talented person with different needs gets to come in late some days... and they feel they are missing out themselves on a lie-in.
No it doesn't explain the animosity because nobody is forcing you to take the cure, but there are people who desperately want a cure.