I don’t know how much of it can really be laid at the feet of WotC marketing vs RPG mechanic NewTech, but the OSR is indeed deep into “Culture of Play” and can be very anti-procedural at times.

4e felt like a rules lawyering playground and the crusty dads of the OSR just wanted a looser game of heavy metal album covers and airbrushed van paintings of wizards.

Relatively hippy dippy stuff, all things considered.