It's not that simple. Whenever you report the exact dates of employment (which you can't easily fudge as they have to match with what the employer can / will attest to), such as for applying for a Green card, it will be clear that you have been in violation of status, in case you were out of work for >60 days. And then you are at the mercy of USCIS/DHS. You also have to attest that you have not been in violation of status when you apply for a visa. Most people don't want to commit perjury by lying on Visa forms.
It should also be noted that this 60-day margin is a recent (2015 or so) relief by the Obama administration that for some reason managed to fly under the Trump radar of undoing Obama's immigration-related reprieves.
Before that, you would technically be in violation of status literally the next day of the firing. Imagine living in the US legally for 10+ yrs, having a house and kids here who are American citizens, and suddenly be in violation of status and expected to pack your bags and leave the next day coz you got laid off.
I see a lot of (well-justified) anger on HN against H-1B etc. but most citizens don't know what perversities our so called 'highly qualified' labor pool has to deal with. These are unique to the United States, btw. No other developed country has such a ridiculous work visa system.