You know what none of those other things were? Explicitly referencing a trend that's long since faded from relevance, while a real celebrity playing themself says "hello look at me, it is me, real celebrity playing myself".

A closer comparison would be Hulk dabbing and Thor playing Fortnite in Endgame – but like, if they did those things NOW, in 2022 instead of 2019. And if they also shoehorned in a real-life celebrity cameo for extra out-of-touch points.

(And I have a particular personal distaste for twerking anyway, but that's neither here nor there)

"Tony peeing his suit"= In character moment showing Tony's drinking problem, need for attention, and other issues. Things he needs to over come .

"Starlord dancing" = In character moment showing in the face of defeat Peter still knows how use his oddball nature to make a perfect distraction (Literally the whole point of GOTG; they're capable oddballs)

"Hulk ass"= Age old in joke about the logic behind his pants

"Cap joking about his ass"= In character moment showing how Steve has grown a since of humor since being with the rest of the avengers.

"Zemo Dancing"= A humanizing moment showing despite being villain who wanted revenge for the death of his family Zemo is just a person. Of course he's going to dance to music he likes if not just do it blend into the crowd.

"She-Hulk twerking"= Disney going "HEY KIDS REMEMBER TWERKING, ISN'T TWERKING COOL!!!"