Tollroads have a constraint, physical-space you could cover every square inch of land with a tollroad and you'd still have a physical constraint, with data that doesn't exist. You can copy data infinitely and you never run out of data. The Government doesn't run all toll-roads, many toll-roads are contracted out. I'm not a socialist but I am one who believes that business has gone too far, and it's harming the country.
There is no difference between toll roads and communications lines. You can "cover every square inch of land with" communications cable and "you'd still have a physical constraint" on bandwidth. The constraint does exist, even though you don't want it to, and even though it destroys your argument.