“This doesn’t mean that golf is easy or that anyone can do it. Golf is extremely difficult but is it a sport?”
Yep.
It is absolutely a sport. While there is not running or jumping or passing a ball back and forth, it requires skill, exception practice, and in the case of match play—significant strategy.
Not a brawny sport, but still a sport.
Is darts a sport?
Bocci? Shuffleboard? Horseshoes?
I'm of the belief that if a fat guy in his fifties can excel at it and not be out of breath, it's more of skill than a sport.
Tackle golf would definitely be a sport.