I don't f***ing like all that lube gunk/lead mess whatever the f*** it is blowing in every crevice in the gun. Lead is exponentially dirtier. I used to shoot lead bullets through my 1911 all the time on pins at one point, but I stopped because I couldn't stand it anymore. On a revolver it doesnt seem to matter so much because the gun is still going to get filthy no matter what you shoot through it.
Besides if someone is running a DE they should be able to afford bullets for it. Even using hi brow shit to reload for that its probably still 20% of factory ammo costs.
ETA: if it doesnt make a mess then why are coated lead bullets so popular? Uhh, cause it reduces the f***ing mess in the gun.
Although I have no idea if those are safe to use
in a DE or not. Probably still too risky.