Woops excuse the double post, I totally forgot to answer the other part here.

And what about a bike shop during the Wright brother’s time? There could not have been enough people who knew how to ride a bike to sustain a business could there?

There was a very, very clear explosion of cycling in about the Wright brothers lifetime, actually, both in the US and Europe. Before cars ruined everything, there was basically a major boom in cycling in the late 19th / early 20th century as this was when the modern bicycle (as opposed to the Pennyfarthing, the one with the big wheel at the front and the small wheel at the back) was invented. Suddenly, many people had access to a private form of transportation that wasn't really there before excluding horses, except those need to be kept alive and a bicycle doesn't.

There was bicycling advocate groups and anything, here is a short overview of the parallels from back then to today.