What is ‘normal’ is unfortunately subjective and can mean a lot of different things to different people. Also often what is listed as ’hard’ is often normal, because most people will see ‘normal’ and decide they’re better than that and have a miserable old time.

This reminds me of UX. Seems like it could be a subdomain.

I think I disagree with your basic point, though what you say about normal vs. hard is funny. I'm fortunate enough to work with a UI/UX pro, and these things have right answers; they're incredibly obvious after they've been explained to you.