I worked on an intensive pig farm in the 70s, and we cut teeth. To be honest, the piglets were only concerned about being picked up and away from mum / food / heat lamp; the actual cutting of the teeth didn't seem to bother them at all.
What I don't know and would love to is, are those just baby teeth? and if so, when are they replaced? Otherwise, what are we doing to the growing piglet's ability to forage and eat lovely things it finds?
(BTW, I didn't cut the teeth on my one litter so far and have no plans to do so on future litters. )