This is simply not true. 5G is both for bandwidth and latency. Your numbers are also very off. 4G can do a lot lower latency than 50ms and 5G will most of the time definitively have higher latency than 1 ms.
Wow, that is really fast for a bike. Are you allowed to drive these bikes on all bike paths and such? Where I live (Sweden) they are limited to 25 km/h (~16 mph).
California is the farthest ahead in regulating them in the US. 28 MPH is the top speed for a "Class 3" bike, and is barred from some bike paths in California:
In practice I ride it like a car when I'm going car speed, and like a bike when I'm going bike speed -- my goal is for it to always feel safe to people around me given where it is.
I'm starting to think it is getting kind of absurd how it is always mentioned that Huawei is way ahead on 5G. This is a message Huawei is of course also pushing very hard to put out there. I'm working in the industry and I haven't seen anything that supports that claim. It is hard to say who is in the lead but I don't think the difference between the top companies is that big.
It shouldn't be so hard to understand the problem.
Let me give you an example.
Apple develops a product with components that are doing the same thing as standard components that are ready available at the market. But instead of using those readily available components they make some twist on it just to ruin compatibility. Then they forbid the company that made that component to sell it to anyone but Apple. That basically gives Apple a monopoly on repairing the device. You talk about sourcing parts, but in this case no one can source parts except Apple unless they salvage parts from other devices which is not always viable.
If solar panels were dirt cheap that would be a solution. But the panels are a lot more expensive than the ground it covers. A farmer would probably be better off to just keep the panels year around and grow nothing.
The cell tower cost is not similar at all. I also used to think that the actual telecom equipment was the biggest cost and then your statement would be true. But generally installation cost and raising a tower is many times more expensive than the equipment.
Digging down power and fiber to a tower is not cheap.