Again though, that’s just how your friend has trained (or not trained) them.
None of mine have ever chewed a thing they shouldn’t . Two of have gone to as puppies but have been trained not to immediately and consistently.
I’ve never had anything in a garden dug or destroyed. A firm “no” as puppies for a few days if they try and they get it fast.
They have always had a contained area when not supervised which means they didn’t get into a habit of being destructive - there was nothing other than appropriate chew toys to touch.
My dogs have also never tried to touch children’s toys after the first week or so. I work hard to train them that they can only touch dog toys that are given to them. I’m currently sat with my 3 and a half year old playing with duplo occasionally chucking the odd bit around, and a 12 week old GR who has learned to completely ignore it. She looks, looks to me and I say, “calm”
and she knows to go back to sleep/back to her own chew toy. It just takes consistency.
”drop” is also the first command I teach for the times when the do pick up something they shouldn’t. My 12 week old will now drop something from across the garden during training sessions.
I had a friend who would despair that her dog would chew furnishings and children’s toys and books when ever she went out - yet she refused to train him out of it, it tried half heartedly to train, refused to crate train or keep him in a safe, confined area when she wasn’t there as she thought it was cruel to restrict him. It’s the opposite, it’s cruel to treat an animal like a human and allow them to carry on unrestricted.