I take public transport to and from work. It gives me time to prepare for the day and relax after a rough one. It also gives you a chance to think quite a bit.
The bus is a lot like a themepark MMO. You get on at the stop, the bus has a determined route and you get off. You can do certain things while on the bus but you’re not free to do anything. The bus is made in a generic fashion to get as many people on board, make them “comfortable” and take them on a ride. A network of buses can get you from point A to point B without stress. Mostly.
Now the bus isn’t perfect. You are stuck with their timetable. You’re stuck with sitting next to some special people. You aren’t going to be picked up and dropped off where you want either. But it does offer a cost effective way to meet a need.
Themepark MMOs are just like that. Generic enough to get enough people to be sustainable yet flexible enough to differentiate between the solo experience and the group experience.
If taking the bus makes you mad then perhaps a themepark isn’t your cup of tea.