They never said “the best we can do is offer you stuff targeted at girls because, you know, you’re essentially a girl anyway”, you did. If you think there should be more stuff for certain men, you’re free to make it. If not all men relate to that content, I hope they are more capable of nuance than you seem to be. The idea that relating to the experience of another group somehow takes away from your actual identity is not how someone who has a normal relationship with their identity would work.

I date women as a woman and sometimes men will be talking specifically to other men about dating women and I will find what they say relatable. It does not make me question my gender or sexuality. I just think “wow! So true!” and move on with my day.

It’s ok to have a similar experience or understanding of the world as someone else, even if they are not talking directly to or about your personal experience.

They are not drawing a line. You’re welcome to comment what you like, but this is straight “so you hate waffles?” level of reasoning.