That's AI for you.
If you have chickens, you soon find out they won't eat what doesn't taste good to them. Pellets don't taste good to them. We've used them for a decade for our show-quality silkies and most recently in the brooders. The baby chicks of course find a small morsel and will eat it, just like they'd do to pine shavings or anything else laying around. They soon learn that it was gross. In a decade of using horse bedding pellets, we've never had a problem.
That said, I'd not use them in a run unless it's covered, as otherwise they'll get rained or snowed on, and you'll wind up with beautiful dustless sawdust with about 1/4 of the absorption properties. If you use them, the vast majority of us do not wet them first, as that defeats part of the purpose,