Not sure what city you're in, but hardly any buses in Seattle even have a 10 minute schedule. In fact, in Seattle you have neighborhoods actively lobbying _against_ transit because transit frequency is legally coupled with rules for housing density.
OP is talking about the RapidRide [0] system. I want to add some additional information for those not familiar with Seattle.
A RapidRide route brings buses more frequently. It also adds additional infrastructure. It's a noticeably larger level of commitment than a regular route. Density requirements make a lot of sense if a RapidRide route is created.
The Roosevelt neighborhood illustrates why this is important. They received a Link Light Rail station in the middle of their urban neighborhood. Home owners subsequently fought to lower height restrictions to 12m [1].
I'm a firm believer if a neighborhood receives well-done public transit then they should have to meet density requirements.
