Thinking you have the ability to love and respect is not the same as showing you will have a willingness to follow through consistently.

I have the ability to be a brain surgeon. I qualified for Mensa back in high school. Made who's who too.

But I'm not going to be a brain surgeon. I'm unwilling to meet the financial and educational requirements.

A lot of men will remain lonely and it's not because of their abilities/capabilities. It's a willingness issue.