I think golfs cheating is in two categories.
First is on the course. Improving lie of the ball, lie about how many strokes, lie that the ball you just hit was the original that didn’t go into the water after all, not taking penalty strokes, taking “mulligans”...on and on it goes.
The second is in the gear. There seems to be no regulations into how long a club can be, how big the head can be, the materials used in clubs and balls. The entire industry is about taking the crappy play out of the player rather than the player honing his skill.
Of course that could all be marketing. Frustratingly fun game though.