It's not about jokes existing, it's about time and place
I liked the first Guardians of the Galaxy even though it was full of jokes because the movie was more or less consistently a lighthearted adventure movie with very few serious moments, and the movie knew when to back off with the jokes. Guardians of the Galaxy 2 was total shit though because there were so many shitty jokes, constantly, that it destroyed the mood of the movie because every serious moment was ruined by being sandwiched with forced jokes. A lot of people felt this way, apparently, and it's not just me.
It's pretty much the same here. Ravnica is literally collapsing, people are being slaughtered in the streets by an interdimensional horde of terminators, dead gods walk, the Guilds are in more turmoil than possibly ever... and Boros legionnaires are just laughing because omg a hippo! >>65516209
That fortuneteller could be miles away from the volcano, far enough to walk away. She could be miles from any volcano and she's just commentating on volcanoes erupting because it's just a bad sign. It's not like she's right next to that shit. On the other hand Mileva seems to be right in the action literally seeing that hippo stampeding around while shit is crumbling all around her and her response is to quip like she's Ant Man. It's retarded.
Have some fucking respect for the setting and situation