The thing is that hetero fans have never really had to question any of that. They saw Randor with Marlena and knew that was ‘normal’, just like their parents, and when they grew up, them. A number of fans have stated that these human interactions didn’t exist for them but perhaps they did, they just didn’t stand out so much because there was no need to question them. It was as normal as breathing air.
Even in today’s society being gay is considered different to the norm; instead of being a different kind of normal.
You are right about the fanbase not being ready for things like this – myself included. I am struggling with the concept of certain characters being killed off.
One a lighter note, I feel sorry for any homophobic MOTU fans out there because they are kinda not allowed to say it out loud – there’s too many of us to deal with!