I watch guys like fmagnets or Yiannis ...putting.
I played Yiannis last year in match play. I was inside of him on approach shots 8 of 9 times. He sank putts. I lost.
There were and I assume are cheaters in WGT, but the current top players do not.
As to realism, of course WGT want to allow us to go low. We have fun that way. I am shocked.