They rarely ask so blatantly, but you can guess they want to know, and if is under a certain amount it is going to be a dealbreaker, at least for a relationship.
Girls won't date guys under a certain income. That's generally accepted. This is why they look at shoes, clothing, watches, etc.
This is why guys BUY shoes, watches, clothing. That it's a criteria isn't even questioned by most guys.
Guys seem to be A-OK with girls with tens or hundreds of thousand in debt. Even broaching the topic seems repulsive to most guys.
Like a huge metaphysical no-no. Like just THINKING about asking questions designed to elicit her debt levels is going to scare any potential poon away, while at the same time, doing everything they can to PROJECT wealth and status.
This fear based tip toeing around the issue is one reason why women feel so entitled these days.