I mean, I guess depending on context? This really isn't about static titles though. Like, nobody fought for straight people to be allowed to exist. Even in our modern age gays are still executed for being themselves. It's understandably offensive if someone is like "I want to show pride too!" if the thing you're proud of is winning the right to openly exist and the thing they're proud of is... being the more socially accepted and advantaged class?

It's not a perfect comparison but it's almost like if a rich person wanted a trophy for being rich because the lower class just got a trophy for surviving being poor.

• Being offended by somebody "calling themselves straight" is stupid and fragile.

• Being "proud of being straight because somebody else is proud of being queer" is stupid and fragile.

• Being "content with being straight and wanting to label yourself as such in an environment where that makes sense" is reasonable.

I dont play the game so I dont know the context but I assume labeling yourself straight does not make sense in a fishing game and as such it is most likely about the second point