No he's got his time frame right on. Superfriends started in 1973, He-Man 1983. Maybe you managed to avoid the cruddy cartoons until the late 80s when they totally took over, but lame "moral lesson" oriented violenceless cartoons started taking over the industry in the late 70s. Don't forget the Smurfs (1981) probably the lamest cartoon ever with the lames "moral lessons" and most total lack of violence.
Oh man, I just realized that I had the most DEPRIVED childhood imaginable. On Saturday mornings, I had to endure Turbo Teen, Carebears, Snorks, the Monchichis, and, so help me, RUBIK THE AMAZING CUBE, with the guy who played Horseshack on Welcome Back Kotter voicing the titular character. At least Muppet Babies was good.
I hated the Smurfs. I despised them with every fiber of my teenage being. I wished torturous hot death on them. I hated them more than I hated the freakin' Shmoo, which should tell y'all the depth of my hatred for the Smurfs.