I'm a parent of one child who is the opposite of feral and never gets hit.
And while yes obviously we should not teach our children that physical abuse is how we keep people in line, this conversation needs to go far beyond the level if disciplinary tactics. What's the whole overall parenting strategy?
I submit that actually having a strategy leads to less abuse, and that those who are the quickest to abuse are also the ones who do not take the time to reflect on themselves, their parenting, life, etc. At least not in a way that could potentially make them feel bad or change their ways.
And I'm not even trying to position myself as a perfect parent above physical intervention. Especially when safety is involved. But you have to leave room for escalation. If everything is met with the same reaction of losing your shit, then no bad behaviors seem any worse than others.
I don't know if modern people are truly any worse at parenting than past generations, or if it's yet another example of humanity's shittiness being exposed by our explosion in communications technology.