from your article, (which i'm pretty sure i have read before)

a study on institutionalised patients in Kansas found the castrated mental patients lived longer in 1969 (that is many of the people in the study would be like 80 yr old mental patients that had been castrated two centuries ago)

while a study on Italian castrati (singers castrated as boys to preserve their high voices) in 1993 found no evidence of extended lifespan

i mean, between the two, honestly the castrati are probablymore representative of avg people. but neither are great, once again, there have been no high quality studies looking at this... and as for the study on eunuchs that lived like a thousand years ago, yeah uhm they definitely don't have a control group there, that's historical records not some double blind placebo controlled experiment, that is not high quality evidence sorry.

maybe we could say: if you are a male mental patient cutting your nuts off, might help, but no promises. (and honestly that makes intuitive sense to me lol)