Honestly, I think it's solely because of the rise of annoying IdPol virtue signalling that the gender and sexuality of the protagonists became a double standard.
Everyone's sick of the culture warriors shitting up pop culture and hobbies at every turn, be they the woke troons at ResetEra or the alt-right skeptics like Sargon and OAG.
It really doesn't help that lesbian protagonists became seen as one of the more flagrantly cliche stereotypes of shorthand vapid virtue signalling and "diversity by tokenism" the quickest of any of the IdPol minorities exalted by the SJW Left.
At this point, lesbian protagonists are seen as a red flag and usually invokes a knee-jerk reaction whether or not the reaction is actually justified.
I don't agree with the fact it's now seen as one of those automatic red flags for so many people either, but thanks to the memetic infamy of Gone Home and pretentious SJW assholes like Gabby Rivera along with media companies cynically exploiting lesbianism as a woke form of fanservice, it's gotten to that point.
If this game came out in 2010 instead of 2020, then I think nobody would really be bothered by the protagonists being a lesbian couple instead of a straight couple.
At the absolute most, you might've seen a few fedora jokes being made at Sony's expense since the bad guys are your typical Christian traditionalist cultists, which was starting to become a cliche even before "Current Year" and all the culture wars autism started flaring up.