This is 1 point-to-point link (laser) with direct aim required. No forwarding, no more than 1 user.

I don't see how this relates to the use-case of millions of broadband users that you are talking about where you are routing fiber cables all over the place. We do have 800-gigabit fiber in core networks, we just don't route it to every home b/c why would we. And 5G radiates to 1000s of users simultaneously.. regularly getting multi-gigabit speeds on mmWave as a regular user is pretty amazing to me.