I disagree.
My experiece with both my kids and as a kid with my parents has shown me that is not true.
Likewise the experiece with most of my friends both from their parents and to their kids.
I felt just like you did and disagreed vehemently. Take a look at the science though and you’ll change your mind. Spanking doesn’t help in the long run and can even hurt the relationship. Your dad is a rare one as most spankers are angry when they spank.
I’ll bet that you and most of your friends did much more than spank and that spanking lasted only a very short time. As an aside, I once saw a child hit their younger sibling in the store. The mom grabbed the kid and shouted, “We don’t hit!” as she smacked him.