You're really making some dumb arguments. Trump is known for loving fast food but that is an outlier. Hell, Trump as a whole is an outlier. And he probably eats much less of it than he leads people to believe. He loves to troll.

Buffet likes McDonald's breakfast? That's not the same as saying he eats a Big Mac and fries everyday. McDonalds breakfast sandwiches with a coffee are in fact pretty good. Also an outlier within the fast food world.

Poor people eat a lot of fast food out of laziness and convenience. It's not cheaper than eating at home and/or taking food with you. It's laziness.

I consume very, very, little fast food of any variety. The primary reason is health concerns. The fact that I am also a snob is a factor but a distant second place.