I find it's because women want a partner to be intimate with and share/build a life with.

Men generally see women as possessions. It's a battle/war/game to acquire a possession so her no is default mode. They don't care about a partner who genuinely wants him because in their mind women don't know what they want or if she wants someone that isn't him she is wrong because as a woman she doesn't know what is good for her. Men view relationships as about what he wants which is why they're often blindsided in breakups or claim it came out of the blue since he was happy he didn't see her unhappiness because it didn't matter.

It's a good thing you don't pursue someone who said no or is disinterested. You don't want to have to coerce or convince someone to date you.