And if they did, many people would simply go to another place that won't make them jump hoops just to get some food.
1. They could put on a mask, go in, and grab a takeaway.
2. Or they could order DoorDash, Uber Eats, or many other options available across the globe.
I think both options make way more sense than restaurants forcing tests on people who don't see COVID as a threat anymore.
Based on anecdotal experience, I don't think there are many people who still worry about COVID: every restaurant around me with >4 stars on Google Maps is full in evenings and on weekends.
I'm kind of surprised that they didn't do so in the past, when COVID was more dangerous and more people were more concerned about it. Possibly vaccination status was then thought to be a good alternative for reducing transmission risk, and many restaurants were legally required to check it.
*Many of them would blame the restarurant, or indeed vilify it as an matter of reflexive politics?
Who wants a swab stuck up their nose every time they want to enjoy a meal?
I can only assume that you are not a restaurant owner.
Doctor - Please don't stick Qtips into your ears. You can damage your ears.
Doctor - It is very important that you stick a Q-tip up your nose every now and then. It is very necessary in the fight against Covid.
PS. How much do Covid tests and whose has to pay for them?
Tests take a substantial amount of time. Door staff could be tasked to check the results of self-administered tests, but monitoring their execution would be far too demanding. Expecting them to be able to administer them in a controlled way is unimaginable.
Anything self-administered is open to gaming by the customer.
Anything administered by venue staff is open to gaming by the venue itself — whether it is protecting scarce revenues, or just treating valued customers differently.