Yes, low-wage workers are famously litigious and apt to bring frivolous and endless claims unless the government steps in to protect the negligent employers.
I’ve seen low margins small businesses destroyed by litigation. The exact probability of low wage workers taking legal action is irrelevant, but it’s above zero and scammy lawyers don’t mind initiating claims in hopes of settlements.
I’m not commenting about whether or not business should or shouldn’t be shielded from covid liability. I just wanted to make it known that liability of legal costs, from low paid and high paid employees, and poor and rich customers, is a material risk to a business, especially ones that don’t already have lawyers on staff.