I grew up in the 60's, all parents behaved like that (and worse), also teachers could smack you around if you looked at them in the wrong way. In grade 5 a five foot - zero female teacher whacked me so hard she broke a yard long blackboard ruler over my backside, in front of the class. This was in semi-rural Australia but "Spare the rod, spoil the child" was a universal truth in western society, everyday 1960's discipline was clearly child abuse by today's standards but I'm not aggrieved by it, it was just something everyone accepted as a "fact of life". Sticking with the old ways is the very definition of "conservative", blind faith that "the old way is always the best way" is just nostalgia playing tricks on your mind.
Disclaimer: I have 3 grandkids, 5 and under, I was an average, imperfect parent but I rarely smacked my kids when the were growing up. My youngest daughter is a better parent than I ever was, which is the way it should be. :)