Precision 7760, typing on keyboard considered non-accidental use or not?

Pretty much lifetime dell user, at least since the advent of the Pentium chip. This is my third Dell Precision Workstation. I've previously always been impressed by the quality of them. And even more impressed by the warranty service. But I've come across an issue I don't understand.

There's this thing on a laptop called a keyboard. And you use your human fingers to type words and commands on it. It's literally how you use a computer. And on this 7760 that I'm currently using, the build quality of the keys seems to be really poor. Even compared to the previous two Precision Workstations that I've purchased and used from Dell for more than a decade. In 11 months, the backing paint, not just the key letters, have worn off on 7 keys enough that there's no letter left and the clear backlit innards of the key cap are exposed. In fact the lettering hasn't worn off at all, it's the backing. 6 other keys are starting to show signs of wear. I can see how it starts on my 'shift' and 'c' key. The backing paint is bubbling up, and the bubble will inevitably crack and fall off creating a weak edge in the finish that then quickly deteriorates and expands.

I've had to replace a keyboard before on my previous Precision workstation. It did last longer than my current one as did the replacement. And you know what, I didn't care that the keyboard failed, because warranty service was excellent and replaced that keyboard with no pushback. But not this time. Technical support tells me now that typing is a form of accidental damage and I must use my accidental damage warranty which is good until 2024 to replace the keyboard which I damaged by typing. I'm rendered speechless by this in terms of moving forward with technical support on a solution. I have only used my keyboard for typing and entering commands, that's literally all I've done with it. 

I looked at the warranty and other documentation and I can't find anywhere that states what normal use of the keyboard covered under the warranty is? 10 letters per minute? No more than 0.025 psi? Tell a grasshopper what you want to type and wait for them to jump on the keys and type it out? Don a wet suit and then white gloves?