I had an incident with the larger one of of my two cats when we had builders round, I was putting them in the bedroom with food and there litter box but Milo the one I was carry got spooked from one of the builders tools going off and tore my t shirt and really deeply cut my back up.
This is the problem with uncut claws - they can dig deep into your flesh, which isn't nice at all. If claws are blunted, the ability of the claw to go deep is reduced.
My 2 hate having their claws cut, so I have to do it when they are half asleep. When fully awake, I have zero chance of cutting even a single claw.