What you're missing is that bikes, and especially ebikes, are far more viable for transport than most Americans think. In Copenhagen for example bikes are actually the primary mode of transport, outnumbering cars on the roads. Bikes are literally the fastest way to get around in many places.
There are a number of reasons it doesn't work well in the States, but broadly it boils down to a) fitness levels, and b) cultural values, that is, spending on car infrastructure helps American car manufacturers, American dealerships, and American car owners, whereas diverting money to bike infrastructure benefits liberal hippies or something.
ebikes directly address the fitness problem, and there are various technical reasons why they have not been viable until now, mostly boiling down to an improved Li-Ion supply chain. That said, a good ebike is still very expensive, and the ridesharing model works here for the same reason that people spend $15 to take a Lyft downtown instead of buying a $25k sedan they own.
The infrastructure problem is harder, but perversely, these services may be able to crack that one too. Uber/Lyft are quite famously adept at strongarming local governments and just in general the political system is more responsive to moneyed interests than hobbyists. Were bicycling to go from liberal hippie pasttime to Real American Business™ that may resolve the political will to improve the infrastructure. Now adding a bikelane is supporting American innovation and jobs (somebody has to charge those bikes) rather than diverting resources from them.