I suspect there may be a discrepancy in what is defined as illiterate. You'll find plenty in America who may struggle to read quickly, but I only know one person who is fully illiterate in all languages (she can spell her name and can read numbers though) but she's more than 90 years old and I'm from a low literacy area.
Iirc the issue with Flint was they changed water sources and with it the PH of the water, dissolving the mineral deposits that were insulating the water from the lead pipe itself.
I mean at that point you can just make backups of your steam games too. A lot work straight from the exe and for the rest there are steam simulators.