4K video is about 25MBit. If I have a faster than 25Mbit internet connection I should be able to watch 4K video. This should be fairly obvious. Oversubscription is the responsibility of the ISP and it is not an excuse.
Wireless is pretty cheap compared to wired, because you don’t need the wires and laying the wires is the expensive part.
If you can’t give people 25Mbit connections with your wireless technology, don’t sell them 25MBit connections.
But coincidentally typically the stuff where the ISPs have all these terribly difficult problems are the services that refuse to pay their extra fees. Kind of like what happens to restaurants that don’t pay the protection fee.