When I wrote, "most people with bikes aren't "Cyclist". They are just people with bikes." I didn't mean that as an insult.
I meant that to say that, in my experience, most people just need a bike for simple things like riding to class, through the park, to the coffee shop or whatever and aren't interested in being a full-on cyclist.
How many times have you heard someone talking about their bike and you ask what kind or brand of bike they have and they reply, "I can't remember. Trek, I think. Not sure."
Beach cruisers are cool for what they are. But, they tend to be large, heavy, and cumbersome. A SS road or MTB bike with QR wheels can easily fit in a lot of places and are light enough for just about everyone to carry or lift without help.
To continue my camera anology, notice how amateur, semi-pro, and pro photographers get the high-end cameras but most people just want a disposable to take a few snaps. And most of those that do have fancy cameras rarely use any other mode that "Auto".