During the past lockdown my University sent students without internet SIM cards with data contracts so they could use their cellphones to tether. IMHO in an emergency situation a public good like the radioelectric spectrum should be commandeered by the authorities --- mobile operators should provide free data service to students in need.
For people without internet in rural areas, cell data probably isn't a solution. Unless you live in a very flat area, being too far from civilization to get wired internet significantly correlates with being too far to get good cell reception.
I recently moved out of the bay area to a my house in relatively rural Oregon. I can't actually work from home though, I had to rent a second house in a nearby town because the best internet connection I can get at my actual house is GEO satellite internet which is far from suitable for work.
I'm only 7 miles down the road from a town of 700, and only ~30 miles from a city of ~20,000, yet I have 0 options for wired internet and 0 cell reception from any provider at home.