I should not have said operate, you are correct. The only other incidence I could find is appendectomy, because there is a clock ticking, they sometimes operate without scans. Though sometimes tonsillectomy onvoarental reports of snoring. When I was writing I was thinking about antidepressants or stimulants for adhd which are generally given based on subjective self reported evidence. They also have permanent side effects and I think we probably over proscribe them. But not giving them can lead to self harm or learning deficits which are also permanent. This seems in the same category. I'm not sure how to correctly weigh those risks, glad I'm not a pediatrician. Also about 0.02% of babies have surgery based on subjective criteria about which biological gender they are physically closest to. That is rare enough that most of us won't know such a person, and private enough that most pf us wouldn't know if we did. Statistically only about 54k in the US. But as many as 1.7% or 5M with objective intersex characteristics. Enough most of us probably know someone who is not unambiguously male or female from a biological perspective, whether we know it or not.