You can also view it as independence and agency. Why shouldn't I capitalise on my resources?
Broadly speaking that's only an issue if the former is much more powerful than the latter and I don't think that"s the case in the UK. There are plenty of other ways of funding education that are very much accessible but selling booty is easier and more fun than flipping burgers why not?
The real pain point here is society's judgement towards sex work.