One of WGTs competitors has macros that allow competitors to applaud each other's good shots and results. It adds a nice touch to the game.
To have the game do it automatically would be very tiring in a hurry. Especially for those who are consistently scoring in the low 60s and the 50s. People would almost be forced to turn their sound off if WGT didn't also program an on/off switch to the feature.
I also wonder if it would be a feature that would really add value to the WGT experience for a large enough segment of the membership to make programming it worthwhile. I definitely don't see it providing any return on the investment WGT would have to make adding the feature