I mean straight is a sexuality after all, and (most) aren't saying "oooh fuck trannies" or any offensive stuff rlly, It's just a preference, just how lesbians prefer women, gay men prefer men, and some people prefer tall people over short ones excluding other groups.. There's a bunch of other ridiculous sexualities out there, I bet if this was 'Super gay' or 'Super lesbians' ya'll wouldn't care much and would say (ThEY cAN dAte WHoEveR thEy WanT)
what I'm really curious about right now is.... are you trans? you don't get to decide what's transphobic and what's not if you're not. also I hope you know you just said the t slur lolz reply