I'm pretty sure I've eaten feral pigs before. I remember it as being good quality. It's common to eat game in autumn where I live. Especially in rural areas.
I think this might be one of these cases where meat consumption might be ethically sound and good for the environment.
Feral pigs are hard to contain. They are smart, greedy, dangerous. They seem to be very similar to us humans in many regards, just less dominant overall, but the pigs we are talking about here also multiply very fast.
There are very few animals who can fight large feral pigs, and even fewer who have good chances of not getting severely injured. Pigs come in packs and they can assess situations much better than typical prey. They can fight off wolves or scare them away, especially when they have a numbers advantage. So the typical wolf strategy often doesn't work. Wolves might have the stamina and composure, but the risk/reward isn't there.
I don't think the article mentions it, but pigs track the schedule of human hunters. They know roughly at which times they will show up, so they carefully try to pick up the hunter's sent and track where they go in order to plan safer paths through the wild. So even if you hunt them actively, it's not an easy task at all.