Part of the problem is that even people who are truly adamant about not wanting kids won't be sterilised in all cases no matter how much they want it. Took me about 20 years of constantly being on the verge of almost killing myself and being potentially dangerous to others before I managed to find someone who'd make sure I can never reproduce ever.

Everyone else insisted I'd just eventually find the correct partner.

Getting it done finally gave me my much needed peace of mind and as a result has drastically reduced the amount of problems I had.