Is it wrong? No. Not at all. Are guys only nice to pretty women? Some of us.
Some of us haven't realized how valuble even female friends are. I don't mind having lots of them myself because to be frank with you am already a bit of a feminist but also as far as dating is concerned I mean yeah it sucks when she doesn't like you back but guys who don't get it just lack something about them Idk what they just don't get that women are always on guard and have their backs up and having lots of female friends makes you look safer to be around and easier to talk to.
which increases your odds of actually getting a girlfriend/romantic partner/whatever terms you want to use. if it's a numbers game ultimately.
the smart ones are also observing our conduct towards the ones we don't find pretty....
I don't know why men are so oblivious sometimes, Women talk...