There's a famous scene in the movie "The Big Short" where a character is talking to a stripper about her investment properties. The movie is about the 2008 housing bubble.

As cash-rich contractors, they were lucrative customers for expensive subprime adjustable-rate mortgages once underwriters stopped verifying steady employment income.

somewhat NSFW: https://youtu.be/MesrrYyuoa4?t=181

Not OP, but generally banks look at stability of income and I think the implication here, as in the 2008 financial crisis, is that strippers and other grey area employees don’t have as reliable income given the cash payments (and likely lack of fully reporting income to the government).