Bandwidth is finite. On mobile LTE networks, about 35 Mbps is currently pretty average.

The problem is that mobile operators are incredibly underprovisioned. If your plan offers 1 GB of LTE data, at 35 Mbps, you can burn through a monthly allocation in 3.8 minutes. That's an average utilization of 0.0087%, or an underprovisioning by a factor of 11,500.

They sell it as if you're buying 35 Mbps access to the network all month long, when really, you can't use that for more than a few hours even on 'unlimited' plans.

I don't expect 1:1 access so that everyone can use their full bandwidth full time; I don't want to pay hundreds of dollars a month for that. But I'd pay a tenth of that for 1:10 underprovisioned access, and I'm sure that plenty would pay a few cents for the current 1:10,000 underprovisioned service...