What's wrong with "Fat People"?
Why can't they be shown on screen?
Scotty got fat in his older years, he's still a legendary figure in Trek & still beloved.
Bald people are still around, I don't see what's wrong with that.
Nothing wrong with Thick Computer Screens as long as you use the housing / shell to put in more hardware behind the display.
Nothing wrong with Non-Alcoholic Bevarages.
You miss the unspoken overarching point: in a perfect future with no exploding panels and constant technological improvements hundreds of years from now, it makes no sense people are fat and bald. It makes no sense they feel the need to drink.
It's unrealistic to even think anybody would chose to be fat or chose to be bald. Just as nobody would chose to be missing a limb or chose to be shorter than everybody else in this fictional fantastical world of the future.
Theyr'e stupid and unbelievable, like an andriod getting his fingers caught in a paper Chinese finger trap, or beaming a large tree out into space and destroying to prove the might of a starship (those damn trees are hard to beat, you gotta admit after all ;-). OH, wait...