What's equally as bad is that most of the women she seduces aren't even lesbians but just women that fall for her because of her power to attract women. That means most of the yuri in this is just meant to be a joke and nothing more. Only a handful of characters can actually be considered gay.
How do you even know? Right within the first arc are there's that chapter where some of her "fans" - including the one she "converted" - talk about a lesbian mixer. The dormmother gets to be (sort of) in a relationship with the loli after Yurika. And the ones hiring the prostitutes, well, they are obviously into women. Plus characters like her legal wife and the loli and the antagonist of this arc ...
I think there's plenty of evidence that at least some of the characters "stay" lesbian (or are that from the beginning). So this "accusation" seems a bit weird to me; is anyone ever shown to date a guy again? Although I'd agree that, yes, of course this doesn't try to portray accurate lesbian relationships or anything, it's just for the shits and giggles. But still, on that point I don't believe you can definitely say either way ...