It’s possible we have only heard part of the story anyhow... maybe the dealer offered to put in a better clutch at cost and we aren’t hearing it, or something.
Bikers CAN be a-holes.
I would like to read the particular warranty regards years/miles and see if it applies. if it does, then the stealership is going to cough up the service.
If only parts, or labor, they will still be on the hook. If the warranty is done, then the rider is looking for a free clutch.
Like I said up thread, a new Rivera (or many other quality replacement plates) is a much better than a stock clutch, which is okay for stock performance, but starts to slip when torque is added with mods.