I know a hunter that made his living hunting boar. He did not use high power rifles. He used a combination of up close and personal with slugs and traps. No oneness wants one of those boars with horns shot by a missed shot. Once along a time ago my late husband and I had the skill. But!

A thought. It would be interesting to find out if I still have it, and if I remember what I was taught.
Boar is really pretty good.. Depending. What goes in to it, how old, and how clean the shot. The last boar I had was one that was brined for some time before cooking long and slow in a pit with garlic, herbs, onions, potatoes and the like. We started the pit about noon, we had gone to bed when my girlfriends father and uncle prepped, warped and buried it in the hot sandy pit. It cooked a good 18 hours I guess. It was a hug party and not much left of that boar, it was delicious.
I have had tuff nasty boar, so your friend is also right. Probably where he grew up the boar had nasty food so they were just nasty and nothing could be done to improve it. I'm sure if your friend grew up on it his family did everything they could to make it so it could be eaten, if not enjoyed.
My late husband wanted me to know how to drive a truck, because he said it is one of the few jobs we on get paid the same as men and he knows I will be alright. After he died I just could not drive, it was to lonely. But I duped go back to it. One of the things he taught me was to lesson to your gut. Trust in yourself, never be afraid to
run for protection and avoid trouble.