Our oldest son is tatted up from his neck to the tips of his fingers, inside his palms as well.
Truly never understood his motivation other than when he was in is grade school years his bio dad would take him to tattoo parlors.
He actually went to tattoo school and did tats for a living. He was great at it.

His spouse is the same. They have an Instagram with 65K followers or so last time I visited it.

It is tough, as a father figure, to watch a good kid get judged. But he understand it completely. When we go eat as a family unit, many times the host makes an assumption they are not part of our tribe.
It's the other two kids, that have no tats at all, that are more defensive over them than they are for themselves.

to such is life, accepting people for who they are, and not be irrationally judgmental while still holding them accountable.