I mean I suppose you could ask the people that voted for it.
>The solution should be raising competitiveness of the market.
Networks like internet providership are notoriously hard to get competitive markets in. Even removing the regulatory barriers to entry there are still natural barriers to entry (high start up cost) and huge returns to scale. The natural state of this market is monopoly or oligopoly.
But even beyond this, this is raising the competitiveness of the market. Internet has become so integrated into the fabric of modern life that many feel compelled to purchase it from the one or maybe two providers in their area. That lowers competitiveness. Demonstrating that municipalities have ways of 'opting out' should force Comcast and other providers to compete with the hypothetical 'public ISP' that citizens can always vote in.