Yeah which honestly is a bit of a shame because as long as they're likeable without acting like morons there's a lot of potential for male friends, even straight ones. I'd personally be fine with em as long as the dev is clear whether there'll be NTR or not, as someone who doesn't like that either.
But you're right, you'd have some wanting them to seduce the love interests, others afraid they will. And if god forbid they have an attractive wife or girlfriend that isn't a love interest for the MC you'd have lots wanting the option to steal his woman, sometimes even by killing the poor guy