Can wireless work like the wired internet?

In terms of cooperation between corporations. I understand that different companies establish completely different wireless networks  that don’t talk to each other. I dont understand it fully. But the wired internet, or the power grid, seems to be much more cooperative.

Cell carriers have their own towers, and the 3g or 4g networks may not talk to each other. LTE is some proprietary thing.

I don’t understand the thought process - but perhaps I need to be in their shoes.