Faulty frame. Try it with other basic infrastructure: "The more money I think I can make by owning ROAD infrastructure, the more I will invest to build it now."
I do not see the flaw. The statement in quotes, while a simplification, is correct if a private company is making the decision. If a government is making the decision (typical with roads, not with broadband), there are a ton of other factors, although in an ideal world they would also try to do a similar NPV calculation. In any case, the government doesn't own broadband.
Okay, what are they? And I mean cons from the POV of users (and hosts are users too in this sense) not from the POV of an unnecessary commercial organisation overlaid (overlain?) on the infrastructure.
I'm not being snarky here, I'd really like to think a new thought.
(To be fair, or just contrary, I kinda feel that all the porn and ads might due with a little reduced service, but I'm not megalomaniacal enough to think that I should get to decide for everyone else..)