Well, it’s not weird, it’s predictable and an inherent outcome of many current societies overwriting the female lineage with their male mate’s. I do agree with the point you’re trying to make, but, it’s just a patrilineal mindset. Not weird, but problematic all the same. I find it’s best to be plain and direct about these things so that everyone else is on the same page about your beliefs, as otherwise we all end up in arguing about rhetoric instead of reevaluating unconsidered beliefs.

Gender has nothing to do with it.

He has no chance of passing on his mitochondrial DNA, whether or not he has children. On the other hand, should he choose not to have children, he will represent a change of behavior that has lasted as long as the Y chromosome has- he is the end of the line.

The same would be true if by chance he only passed on his X chromosome, but at least then the attempt was made, and he could keep trying as long as he had willing partner(s).

It isn't weird to gender it, I think you still don't understand what they are saying.

I gendered it because I am male. If I were female I would write how I would be the first in a direct line not to have a daughter.

Who mentioned gender? He's talking, very literally, about sex.