I guess the real priority is to make sure the brunt of the costs of these decisions are borne by those towards the bottom...
Legal liability will incentivize business to take steps to contain the virus and reduce transmission. Take that away and in many businesses will just go "¯\_(ツ)_/¯, not my problem."
"Essential to our way of life" is actually a pretty expansive category, which encompasses a great deal of stuff that not actually essential by any reasonable definition.
On the balance of probabilities, I'd bet that many people will just eschew dine-in experiences. At least for a year or two. Can you survive the year or two with decreased dine-in traffic? That's the question owners should be trying to answer. If your footprint is small enough, I'd suspect the answer is yes. If you've got a larger footprint than is prudent in the new reality, you'll likely need to make some changes.