Fighting sarcasm with sarcasm.
While i am sure an argument could be mounted that golf could be safe, i am sure the same could apply to lawn bowls and croquet. And cafes with in door dining with controlled numbers, likewise pubs, and open air concerts, and footy, or soccer, clubs training, or galleries opening, or musuems, or cinemas, or any number of activities.
But the more people who are out and about, traveling to different places, parking in the same carpark, using the toilets, buying fuel etc, the more opportunities there is for transmission.
At least you had a crack at it although other states are playing golf/fishing and not allowing those other activities. I'm not commenting on the other activities you mention, not sure what relevance they have to my posts about this.
Seems other states experiences suggest there aren't great risks. And with many banging on about mental health consequences of isolation I think the risk/benefit scenario would suggest golf and fishing should be allowed.