What about being gay or trans or wearing taboo clothing shortens lifespans?
All of these traits are easily hidden by most people who display them if need be.
Most humans are easily capable of viable reproduction by the age of 13 or 14 which also happens to be when most of us are cracked out on brand new sex hormones and are ravenously horny so Its not hard to see how the population carries on in spite of the fact that a very small percentage of the population either chooses not to or is incapable of producing off spring.
I should know I did it for 34 years and in that 34 years I tried to do what I thought I was supposed to do and got married and had kids. That relationship is long since over (hallelujah!) and I have moved on including finding a new spouse.
My husband and I just celebrated 1 year! I never should have been in an intimate relationship with another woman, the results were disastrous. This time everything is the right way around though.
So anyway, mine is just one story. Here is another. In high school I briefly dated a girl who's dad had come out as gay when she was in grade school. I'm sure the separation and divorce were hard as I'm sure it was for my kids but after a year or so the kids get used to the new normal. Besides LOADS of people get married have kids fall out get divorced and move on to new relationships. The very idea of the "nuclear family" was just post WWII population regeneration propaganda BS.
So again, what is so fatal or "anti-procreation" about loving someone of the same sex or knowing you got the wrong body at birth or liking to wear clothes that other people say you shouldn't wear?