"What makes you think that? I mean, the first time could have just been an accident, right? I'm sure they wouldn't ignore the safety of their performers or customers. Sure, they might get money from the initial tickets but if this kept happening they wouldn't sell any because nobody would trust them."

Which, while Marinette's thinking might be logical, it's also possibly naive? Optimistic? In that she isn't considering that people might also just be thinking of the initial short term gain of money from a second concert. Still, she follows and sits down with the others, also taking their lead on talking quietly, even if most here probably wouldn't understand a word she is saying.