What’s the difference in a man not freely telling a woman he’s had a vasectomy and a woman not freely telling a man that she’s infertile?

I asked this on a very recent thread and I haven’t gotten an answer but I received multiple downvotes. I don’t mind downvotes, except for the fact that it buries comments/posts so they are less answerable.

Regardless, all I’d like to know, please, is what is the difference of “guy doesn’t tell a woman he’s been snipped” vs “woman doesn’t tell guy she knows she’s infertile”.

To me, they are roughly the same. They are your own damn business until someone asks and you can decide if they are important enough to you to disclose.

Please help me understand the difference though, if I’m wrong.

Thank you for any answers.