V and T both have fiber running to damn near every 4G tower and they're delivering competitive solutions to the stagnant wired copper providers
today.
It doesn't matter that "5G" will presumably run way up and above 5ghz and have line-of-sight issues. LTE runs on high bands and low bands. It's not an either/or thing -- it works on 600mhz and 700mhz and 1.9ghz and 2.5ghz. "5G" will eventually do the same. The low-band network is great for coverage and the high-band network is great for capacity. They compliment each other.
It also doesn't matter that V and T will probably want/need some more density as the two or three tower/sites in the area grow to a few more to cover homes subscribing to $50 Unlimited† 4G/5G Fixed Wireless. Even T-Mobile is
dipping their toe back in after sitting things out for a bit.