Turntable

A properly designed turntable bearing relies on a thin film of oil to provide enough pressure so that it works properly. "filling holes" doesn’t help as there should be no metal to metal contact. The counter argument can be made that a rougher spindle surface "grips" the oil better and aids in bearing performance. Having said that the treatment should do no harm, as long as it doesn’t drastically affect viscosity or bearing clearances. Also because TT bearings operate at low rpm bearing "failure" is a possiblity and in this scenario reduced friction of the surfaces can be helpful.

Bruce
Anvil Turntables

Oil well turntable bearings unlike for example a crankshaft bearing can't always generate the rpm necessary to assure enough pressure to prevent metal to metal contact .  Im not saying they don't work however, just contact is possible. Hi friction in a bearing in no way increases speed stability. Once warmed up and the viscosity changes it doesn't hurt it either. 

"Others" are wrong, LOL. 
Inverted bearings "work" better at low rpm in theory but have other disadvantages like higher friction. Lots of ways to good sound. 

Of course I amin the low friction camp so I am biased. I can't think of a single advantage friction adds to a TT.  NOT saying that higher friction designs sound bad, just that in theory it is a detriment. 

Low friction bearings allow for smaller motors, less noise/vibration, simpler controllers, better dynamics, quieter playback, greater simplicity etc. Air bearings are great and achieve these goals if you don't mind dealing with a pump.