I think attributing it to "having the right to be wrong" is overly simplistic and you're missing a big chunk of what the core problem is - when you walk into a voting booth you are allowed to[1] check either the D or the R box. If you've followed a few rounds of elections chances are you've held your nose at least one of the times you've voted. Can you be a member of the GOP that is pretty well convinced that while the conservative courts might overturn Roe vs. Wade that gay marriage is essentially set in stone at this point? I think that's reasonable, I actually think that's pretty correct... No matter how extreme of a Mike Pence we get in office gay marriage is here to stay - if you're taking that as a given then maybe you're concerned about gun rights or the economy of one of a plethora of issues.

We're all complicated rainbows of opinions and when voting day comes around we're forced to either be red or blue and that's a problem.

1. Effectively, obviously you can vote third party by FPTP single slot elections make this incredibly ineffective - sorry... I really really wish this weren't the case.