Eh, I thought the same thing but I've really enjoyed the classes. For me it's not about motivation, it's about getting structure to your ride without needing to plan it yourself. You also get things like the strength classes, etc, which provide the same value. If you work out every day, planning what you're doing accrues nonzero mental load. It's nice to just pop on a class and know you'll get a decent core workout, or whatever.

And I definitely wouldn't say I'm a member of the "culture", I get on, do a class, get off, that's it. The price is worth it for two people in the house I think.