It is totally reasonable, as a man, to pursue a relationship or sex with a woman who claims she is lesbian because she could just be playing hard to get, amirite?

No. If someone expresses disinterest in any way, shape, or form, leave them the fuck alone.

if your are straight and claim to be a lesbian so guys stop hitting on you, you have a certain spot in hell reserved for you

If I’m not interested in you, GTFO.