Why don't clothing companys make clothes that actually fit everyone?

Granted, I'm sure that would be difficult and more expensive but really, especially if you are taller like myself, I'm 6'1 and just a tall and slim guy but alot of times find it hard to find shirts that fit right. Either they are too small or too wide or too short. That's why I prefer the stuff in the Big & Tall section, albeit, only the XL tall stuff because I'm not extremely tall but at least the XL tall stuff fits a slim frame better and is not too short. how many people, men and women have that problem when shopping for clothes?