If we're vasectomising baby boys, can we also staple everyone's stomach at birth to prevent them getting obese? After all, obesity causes many people great misery and is a huge drain on the NHS. People could get the process reversed as adults when they have gotten used to not eating too much.
How about a device implanted in everyone's stomach at birth that eliminates alcohol before it hits the bloodstream, which can be disabled at the age of 18 (21 in America)? And on the subject of mind-altering drugs, how about a device implanted in the bloodstream that eliminates MDMA, Tetrahydrocannabinol (thanks Wiki) etc before it reaches the brain and can only be turned off at 18. Hang on, maybe that one shouldn't have an "off" switch, they are illegal drugs after all. Hmmm. Let's leave the alcohol one switched on permanently too, alcohol would certainly be illegal if it was invented today!
While we're at it, how about a device that monitors your thoughts to protect against socially harmful ideas. That one could be selectively altered as you get older. At 3 it's "I must not hit anyone", at 13 it's "I must not have sex". Again, that one we may want to keep switched on even after 18 - it would be a good way to stop certain people gathering in large numbers with the intent of causing social unrest!
Excellent, I think I've just about got my wish-list sorted. Welcome to a better humanity. Fitter, happier, more productive.
OP, I don't mean to sound flippant but history shows us how easy it is for a country to slide into totalitarian dictatorship where people have their bodily autonomy forcibly removed. I totally get your point, but making sure this kind of idea is never put into practice is part of what keeps our society a democracy.