I think the problem is that people read the rules and then want a way to bend them to suit what they want to do.
So the meet 1 other for exercise is presumably for people to meet someone for a run or cycle ride or a walk, or maybe a PT meeting a client. It's to encourage folk off the sofa and outdoors to get some exercise for mental and physical benefits.
Instead what I see happening across the road from me every day, is mums and daughters, or women in general, park in the car park at Costa coffee, grab a coffee each then trot up the road for their exercise. All within the rules, all allowed and permitted. But they are back 30 mins later, still supping the bucket of latte and then stand with their car doors open, or park side by side and sit, drinking their coffee and munching flapjacks. Fuck knows how anyone has any meaningful exercise with a gallon of coffee, and am not sure that the gossip at the end counts as exercise. But it's within the roolz init so allowed.
The problem is not that the rules aren't crystal clear (they aren't) but that people still want to do what the fuck they want to do, so they ask fucking stupid questions about the roolz to justify them doing what the fuck they want.
No picnics means you aren't out and about to fucking eat. If you are 3 or 5 and been out an hour, eat a Barney Bear. If you need a fucking banana on a bench you need to not use the pandemic to improve your fitness to extend the amount of time you can survive without feeding your face. There is a tiny % of the population that will need to eat while out and about. And sit to do it. If you aren't in the % save your snacks for when you get home.
It's people taking the piss that will see rules made absolute idiot proof, set times on exercise and have benches taped off again. So the truly vulnerable suffer whilst you whine and bleat about the erosion of your liberties to exercise outside and sit on a bench and eat a banana.
And having lived through the lockdown last year near an area that people like to walk and cycle and run in, if everyone had kept up that amount of exercise over the summer when the pubs reopened then bo one would need a fucking banana cos you would all be sprinting round.