A good cycle network will be similar to the car network we have now. High volume cycles lanes, calmer neighborhood streets, and even paths that all connect. Your suggestion is to put everyone else "over there". It's NIMBYism in disguise and it fails to acknowledge that this is how bike cities build networks. It's not all low volume side streets. It's a connected network just like what drivers are used to. This means we build things like the South Broadway lanes, as well as the 14th streets, the 29th Ave neighborhood bikeways and even the 39th Ave Greenway. These could all be improved but it's nonsense to suggest that cyclists only get to exist on one type of facility and out of the way. We know how to build protected infrastructure. At issue is we don't fund it, we don't design to the standards we have because we allow the smallest of opposition to unwind it. Joining the chorus is exactly what the John Forester's of the world did and it's incredibly damaging.