A CRISPR Calf Is Born. It's Definitely a Boy
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For example, in theory not wearing a seatbelt is a purely personal decision.
In practice, that decision can have considerable negative externalities - impacting family, friends, emergency and medical personnel and finally the taxpayer (I live in a place with nationalised healthcare), etc etc.
Similar problems play out (statistically if not on a personal basis) with respect to drug use or other risky decisions like going into deep bush or out on the water without adequate precautions.
If there's a reasonable expectation of not being shunned and left to die alone in the event of a mishap, I'd hope that home experimenters would spare a thought for those who will no doubt help care for them and deal with the mess if something goes wrong.
That said, I expect and understand that reasonable people can hold quite different views on where the lines between social responsibility and individual freedom should be drawn.