Probably not, except cost. It would be too expensive to compete with the national providers and then you would still need to interface with them for any service outside of the city. It's possible, just not the intended use case and not a logical use.

Wifi adapters are cheap and everywhere. For 5G tot surpass wifi it will have to match that. Laptops with 5G are not that common yet. ESP like controllers with 5G I haven't seen yet. One of the advantages is 5G operating outside of the ISM bands. That helps a lot with stability and preventing interference. It also means this is not for individuals in their home. If licensing is made so accessible that people at home can use it you will again get overlapping frequency use and increasing interference. If it not made this accessible I don't see the availability of cheap clients solved because the market will be limited.