That is a myth. I heard the same things too Mitch and it is an old engine builders wives tail. If the roller didn't roll because it was so slick that would be fine with me. It would be riding on a thin sheen of oil and cause no wear. If your roller lifters are hanging up then you should have a talk with the manufacture. The only time I ever lost a roller cam was when it broke. Thank you Iskenderian
The only time you shouldn't use it is during engine break-in when piston rings need more friction than normal to properly seat. Also in leaky engines synthetic oil can exploit those leaks and be worse.