That's not true. Geese Howard's pretzel move is very difficult on its own. Even high level players mess up EWGFs. Complicate all this even further by playing in an arcade with a square gate. And not to mention the extreme moves like pentagram input from arcana hearts 3.
Some inputs are hard but I don't see this as a problem. There are many characters in most FG's so I don't see a problem with some characters having challenging or even extremely challenging inputs. Some players enjoy that challenge, and if you don't, you don't have to play that character, you can play one that fits your playstyle.