I'm considering asking a GP doctor for advice, but doubt some kid has something sensible to say (though the doctor at the clinic performing vasectomy might).
I have in many ways ****ty genes, I don't want kids, I'm old, I want a good sex life. I could have wanted kids if my life panned out in a different way, but it didn't. But it still feels like a major decision. It's an acknowledgment of various negative aspects that preferably shouldn't exist (my genes and life conditions), but not taking a vasectomy doesn't make them vanish. So the situation is rather clear, to just do it. It's indeed far from perfect, but as good as it gets.
What is a concern is that some girls will deselect me because of not wanting to have kids, but that problem doesn't change, vasectomy or not. Tired of the troubles of life.