Two things:
I’m a bicyclist AND a redneck.
It most jurisdictions it is illegal to ride a bicycle on the sidewalk. They are required to ride on the road.
I’m with you regarding rude bicyclists, btw. Bicyclists are like drivers of cars - there are good ones and bad ones.
I’m retired and I still ride my Trek, but never in city traffic. I do ride some around the farm and on lonely gravel roads. It’s suicide to compete with cars while impeding the flow of traffic, not to mention people with cellphones. I’ve know two people hit both of which survived but never fully recovered. I almost hit one myself in the evening. They simply do not provide the out line profile of a car or truck and people just don’t always see them. I’m a proud redneck too and so is most of my extended family. A good many of us are scientists and engineers.