It is overwhelmingly likely that WGT knows a lot more about your shots than you do.
They should have a link to the replay of the shot that you are about to take and the shot that you just took.
They should know exactly what club you used to hit those shots, whereas even the most careful players are only ~99.95% sure, and players, unfortunately, can't check what club they used after the shot is taken (unless it is obvious, such as having mistakenly used a 3W instead of a 3-iron.)
They should also know what sort of random deviation you happened to get stuck with.
They should know elevation changes to a much higher degree of precision.
They are also most likely allowed to see much more detail on the greens and multiple camera views that are not accessible by players.
They should also know the exact angle of the wind in relation to your shot, whereas even the best players can be up to +/- 8 degrees off.