Given the great intentions that such bastions of corporate ethics like AT&T and Verizon have, is it possible that they simple held out until the got what they wanted?
So, not investing in infrastructure is not the problem, but preventing others from doing so, is scummy.
They do not want to invest AND they don't want to compete.
It's actually a rational move. Title II prevented them from competing effectively with the companies that were not under Title II, hence the rational decision not to invest in competing infrastructure.
Then why, when reclassified as an information service, did it not get better? It got better from 1999 to 2005 (768kbps -> 1-6Mbps), but only in very select regions has it actually improved beyond that in the past ten years.
(This is where AT&T switched to "Uverse" fiber-to-the-neighborhood network, with speeds up to 40+mbps. And since that's an "information service", no other companies are allowed to use it to sell internet, even though it's literally the same phone line as DSL, with almost identical technology and performance seen in other countries faster DSL services)
And I wouldn't say "very select regions." At least a quarter of the country live in areas with FTTN or FTTP networks deployed by the telecoms.
As soon as it was deregulated, Verizon and AT&T began upgrades. But before then, they weren't going to build upgrades to networks that any competitor could borrow at wholesale value.
The title II being proposed is a lot lighter than the old kind applied to the DSL, so it won't necessarily destroy invesment. But the fear is reasonable.