A sort of thought that weirds some people out but to put it parsimoniously, it’s not entirely owners’ fault why their pets stray even if that does influence it for the worse. It can also be attributed to that they can’t always afford or easily find things needed to keep them from straying, especially if these are that far away. That’s even the case in Russia and Australia (and China’s Tibet) where they’re that deserted. (China might not remain as the world’s populous country anymore.)
It also gets complicated by religious beliefs and/or societal customs being dogs are dirty or something to that effect. It’s not that they don’t cherish their dogs but only to a certain point where it’s needed to let them out as to not literally deal with their crap often. (Same for cats to some extent.) In some settings, simply walking your dog to nature reserves can be just a problematic especially if owners aren’t careful.
(I’ve read numerous reports of dogs in Europe killing wildlife like deer at will.)
It also gets complicated by the ecologies pets inhabit. This is where Andrei Poyarkov made his observations. You have owned dogs straying at will especially in or near compounds, villages, forests and farms. Then you have owned dogs made to guard public premises. Then you’ve got street dogs and truly feral dogs. Then there comes the truly domesticated ones.
Not to mention that in some cases, if dogs ever do get trained to hunt at all it’s often done by starving them (same for cats), drugging them and/or socialising them to other dogs. Even if the idea that dogs being commensal does provoke people, factors like ecology, economy, geography and ownership practises can encourage this for better or worse.