"even a person who doesn't have to file tax forms (due to low income, etc.) can file a 2020 1040 form"

And why would you wait until Spring of 2021 to file for tax year 2020 to get a stimulus check, when you can Enter the info on the IRS website right now, and you have 5 more weeks to do so? How does that make sense to people who are posting all over the internet in places that have nothing to do with their issue, and obviously are in a bit of a panic or dire straits and would like their money ASAP?

Don't you see how you are encouraging them to Not Follow up Timely?