It's supposed to be "people over process", yet most "scrum" is all about process: too many meetings and other assorted bullshit like filling out your sprint planning and retrospective report every 2 weeks.
Scrum is about getting people to talk to each other and that's what all the process is about. If you already have good communication between developers and those making the business decisions, then sure scrum is probably a waste. Places that actually have that communication without having scrum force those people into a room aren't common. It's also common that places that don't really do scrum don't have empowered PO's or devs, so the meetings are wasted time.