I agree so long as the government doesn't choose winners and losers like they have done and still currently do.
AT&T prior to the breakup is a good example of how far this cronyism can go. Don't get me started on the industrial media complex. Right now it is cellular carriers and cable companies. Both are using public resources unfairly.
Your public road analogy is good, but if you were to accurately compare it to the telecommunication industry there would be roads that only Ford, Chevy, and Crystler vehicles were allowed to drive on. Chevy would make and agreement with Ford to allow eachother's cars on their roads but not Toyota, KIA and many others. The barrier to entry would be so high that newer better cars would not be allowed in.
When Cox bought out our local Cable America in Phoenix all they did was switch subscribers over, and charge 20% more. Did they use any of the infrastructure of the competitor that they bought out? No, they systematically dismantled it. All of those years of negotiations with various municipalities to get access to easements, poles, alley ways, etc. all gone. The millions of dollars spent to install that mostly redundant infrastructure also gone. There is no possible way now, unless you are Google, to come in and compete with them.