I don't think it's "I can do the sexy thing better than these other girls." I think it's "I can put in next to no effort and still get these fucking losers to pay for it."
She doesn't have to be fully into it but she could at least stop smiling as if she's about to start laughing. It just comes across as insulting to those who paid for it.
I think this is also why she puts out those grainy low-quality pictures. She knows she can hand her simps absolute trash and they'll still pay for it.