I am saying that there is a greater chance of issues with a less expensive bike. Surely you can appreciate that there is a difference in quality between bikes of different prices.
Yes, I do agree, but more to the point here is that there ARE pretty decent bikes available at price points that make it more and more difficult to rationalize bikes costing 4 times as much. Also, there are inexpensive bikes where you can reasonably expect good service life. Even if there were a break down (IF!), most of the parts are pretty much standardized and are available everywhere, even if you had to go back to Rad for them.
Point here being you can't assume problems like batteries falling off and electrical gremlins are going to be present on any inexpensive bike. I think the Rad line demonstrates that point pretty well.
That would be a legitimately good strategy for many users, especially since twice the price of a Rad is only about $3K, which does not get one a "high-end" bike, merely an LBS brand bike. Some of that $3K is going to the middleman, the LBS. Where it begins to diverge is when you go even higher, where it is not only a question of quality, but of category and performance. Rad only makes utilitarian and recreational e-bikes; they do not have road e-bikes, or e-mtb's.