Man gets sued for taking his vehicle for an oil change

Ironically, I suspect their Garage Policy probably excludes coverage if they let someone other than an employee drive a car inside their garage. But Efil would know the ins and outs of that.
Can the owner challenge this stupid law in Federal court? I'm not a legal expert,but this law seems so stupid.

My wife used to get her oil changed at Walmart. She'd drop her keys off and go shopping. If a technician killed
someone while driving her car, how in the world would she be responsible for their death?