In same way mobile companies got regulated what created a big market for mvnos what dropped prices by factor or 3-4.
The problem not with unbundling but with how regulation was done and what loopholes it created (no idea what went down, but based on article many people spent a bunch of time in court fighting it). Though, my personal guess that incumbent telecom that were unbundled had also mobile businesses and decided to go for mobile broadband and just to let copper die. In Israel telecom/cable companies were forbidden from operating mobile network.
As anecdote, after I moved to states I had a chat on some network conference with somebody who claimed that he is very liberal and was complaining about quality/price of broadband/mobile in USA. I suggested to do same reforms as in Israel to what he replied that this is extremely crazy approach.
They already have that capacity now; the proposed house bill would remove it.
I know of several members of the house & senate who are severely hostile to ISP monopolies, but power at the federal level lies mostly with the FCC, thus blunting the effectiveness of any particular elected representative.
At the local level, get the mayor pissed off at you (and a legal framework that allows it), and you (may) have a problem.