I theorize that the fragile straights aren't actually straight. Which I assume is what the developer is poking fun at with the quotation marks.
Our social default is still to assume that most people are straight. It doesn't make sense for a straight person to have a driving need to prove that they are straight ... unless they think someone would have a good reason to put them into a "non-straight" category.
Congratulations on contributing to othering and discrimination against yourselves and your communities.
If I were straight I'd be offended at this, not because I'm a fragile widdle loser, but because it literally implies LGBT people are not normal, and it's a setback in society's fight for equality.