Your thoughts on the matter are exactly part of the problem. The rules are simple and by some thick idiots, are not being followed.
If you must know I am being really strict about social distancing. Thinking it through preventing two people sitting, prevents of lots of people deciding to sit and there by forming a crowd, which is a reasonable rationale. This still does not explain why I have seen photos of individuals being moved on from a park bench, why can someone not sit in isolation and enjoy the open air while others can walk past? surely allowing the use of a park bench as opposed to a chair or picnic rug prevents crowds? Another example it is ok (in Victoria) for two people to walk on a golf course provided they are not playing golf, in NSW they half seen how ridiculous this is and allowed two people to play so long as they maintain the 1.5 m rule. I can't sail my dinghy but I can take a canoe onto the local lake? I am all for the social distancing but some of the disparities in the rules need to be ironed out.