Why are we so eager to villify people who break up with their SO's because said SO's won't have sex?

Now, curb those gut reactions, people. I know a lot of you including myself if I ever saw this question immediately think the dumper is an evil, vile person, but, hear me out.

Sex is an important part of relationships, even for people who choose not to have it. If two people are incompatible sexually, it is reasonable grounds for the relationship to end. Why does this not extend to a person who breaks up with his/her SO because the SO does not want to have sex?

I find that now I am sexually active, I would most likely not want to be in a relationship with someone who did not want to have sex. This is because sex is too important to me. It is a way for me to bond with someone and earn their trust as well as show that I trust them.

I understand that some people are just uncaring assholes who just want another notch in their belt but what about those people for whom sex is genuinely important?

Please try and give me objective answers. Like I said, I’m sure a lot of people will have a gut reaction to this question.