People judge each other all the time. Conservative men usually judge us by our looks. People feel attracted to what they feel attracted and if they don't find attractive a woman because her looks, they won't bother to know her. This is similar. If someone doesn't feel attracted by sexist guys, well, then conservative people won't be attractive to you. Why waste your time if you already know what would be the result of the date. Worse, chance are that you not only won't enjoy the date, but that you have a bad time. Also, you risk that they guy "won't take no for an answer when going back to home" or decide that he can "grab you by the crotch" or any other disgusting situation. People already know enough to know that they don't like them/aren't attracted to them. Why do you think they have a right that an "old, fat, ugly women" isn't entitled? Do they date every single women they met? No.

It is not unfair, they already have been given a chance and failed based on their values and ideas. The same chance everyone gets. And turning them down early is way more considerate than going to a pointless first date and ghosting. That saves them time and money to use looking for a conservative woman who sees herself as inferior and is willing to be the perfect wife. There are "women for Trump" so there is a chance they met someone who share their values.

But I guess I get it, it challenges their world view where they are entitled to compliant wives who would love them no matter what.