I grew up in Australia in the 80s/90s
I was hit as a kid. I have no distinct memory of being hit really, but I have distinct memories of being scared of it if I misbehaved and parents getting angry.
As a parent now, I see two reasons a parent might hit their kid, and neither is acceptable to me.
(A) you lose your temper because the child misbehaves. This isn’t acceptable because you’re reacting emotionally. The outcome could be extreme, either mentally or physically.
(B) you don’t lose your temper and make a reasoned decision to hit the child. This is even worse because you’ve justified hurting a child, to yourself.
Its not news that how a child is raised will impact their outlook on life. I wasn’t hit a lot, and I’m generally able to not make a physical reaction (such as hitting) when I am upset with my son.
I’ve seen first hand that others who had more violence in their childhood (eg hit with a wire coat hanger by a parent) will themselves be much more likely to react with physical violence if they get upset.