I agree with all your points, but I think it's worth pointing out that those benefits you mentioned are largely for the developers. As a consumer I love a well-written SPA when the problem set calls for it, but most of the SPAs I have to use are garbage. I don't fault the tech for that, although I suspect that a lot of those SPAs were created by "me too" people that just wanted to build a SPA. When React was in the pre 1.0 days, I did that, and several people on my team as well (so I'm not casting any stones here, just trying to state facts).

Last time I bootstrapped a React SPA I don't think cra includes a router ootb.