Yes this is true, but because of the separated infrastructure there are much fewer collision point between motorized and non motorized traffic. Basically all streets where cars can drive 50kmph (30mph) and up cyclist have a separate cycle path.
Not many, but when I did, I've considered it as something I'd try to find out - why. The benefits are obvious, learning process is rather easy so reluctance to do it would at least intrigue me.
In Holland, it seems like a lot of effort is put into wheelchair access. At least for newer buildings (Post WW2) and public transportation. But I'm not physically disabled, so haven't actually experienced it fully.
I was surprised that in NYC not all stations and platform have wheelchair access.
Having said that, there is significant effort made here to just reduce conflict points between modes of transport. No law can help you if you're dead.