We don't have a handicap. We have a stroke average. They are very different.
With a handicap system, players adjust their score after a round based on their handicap.
Most players subtract their handicap from their gross score. A 'scratch' player (handicap of zero) does not adjust their score.
Most pro players would have + handicaps and have to add strokes to their gross score,
WGT is set up so less accomplished players play a shorter golf course (hit from tees closer to the hole) than more accomplished players play.