DH also used to want to turn the kids early. It came to a point where he'd turn the car seat around when bubs was only 6mths old and I wasn't prepared to risk it so the solution was simple - we wouldn't go in the car. He swore that it would help her sleep to see forward blah blah blah. Got one of those mirrors so you can see them when you look back and got one for DD to look at herself with. Didn't have to turn her. She was happy.
DS has a mirror. So no need to turn him until he hits the weight limit and even then I'll be making sure its absolute, you know. Not something you take risks with. I think sometimes parents want to turn the car seat earlier because it helps them think oh baby is growing up how amazing what a milestone, if that makes sense. And also because then you can see baby all the time. But its great you stand your ground. Safety first. Isn't that a car seat brand too lol?