Seattle

Not from the area, but do your bike lanes look like this?

These types are death gulches, and are super spooky to use, since you can get people drifting in from the left and smashing into you, or someone opening their car door from the right and knocking you down into the active road.

If you don't have the type that are protected, or they are, but aren't connected to a larger network, they aren't terribly useful the same way a dirt road isn't useful for inner city traffic.