You don't owe a man anything just because he buys you food. It's possible to allow a man to be a gentleman and gasp not lose your feminism card. The patriarchy would have you believe that this is somehow having your cake and eating it. That you can't be equal men and yet, also treated as a woman. Dont buy into that con.
If you don't want a man to treat then that's fine. But don't judge those who do. As pp have said, men earn proportionately more than women.
It is also fair to say that women are socialised to put a lot more effort into their looks and tend to feel the need to spend more getting ready for dates than men, on average. So it is fair to say that women are more likely than men to spend more on looking 'good for their date', before they even get there. I don't believe it's fair to call women who do this 'high maintenance'. Because it's the way women are socialised. So that would be some ingrained mysogny there.
Of course those things can be taken on a case by case basis, to an extent. But the point is, just because he pays for your chips, doesn't mean youre a gold digger. And I actually think it sets women back when we buy into this idea that being equal to a man means having to act like men and absorb all of the traditional male roles and traits as well as keeping up the traditional female roles.
That accepting a man paying for us is somehow weak, is something the patriarchy wants us to believe. It wants women to shut up. To feel that that aren't also entitled to be respected AS women if they choose to ask for respect as human beings.
You can kid yourself all you like, this is a man's world. You are much more likely to find yourself impoverished than he ever will be. And when you do, you are more at risk of exploitation. So if he offers to pay, hell, I say let him pay. And ffs, stop letting idiots make you feel guilty about it.