I bought a new Dell laptop 20-ish years ago along with whatever the super-duper coverage was called at that time (Complete Care, maybe?). IIRC, it only excluded deliberate damage (and "hammer marks" was used as an example).
But they had no trouble sending me parts. Power brick soaked in a flood? No big deal; a new one is on the way. Dropped a screwdriver on the screen at work? They sent a whole person over to replace it.
It was very expensive coverage -- it cost more by itself than the used/refurb laptops we're discussing. It was sold separately. It did not, by my estimation around that time, ultimately pay for itself.
But if you score it for "free" with a used machine, then sure! Bargain!
(A person can check the warranty/service status of an unmolested Dell machine here: https://www.dell.com/support/contractservices/en-us )