I feel for you. We had a palomino quarter horse when I was a kid. My brother and I each got ponies when I was 9, we knew nothing about horses. His turned out to have Wobbler’s. that is why seeing your horse’s splay-footed walk it immediately came to mind.
Do consider the treatment options because I know you say it doesn’t matter if you ride him, but that’s not the only way to get hurt around a Wobbler. The issue with our Wobbler is that he could just be running along in the field and wipe out. as a baby it’s maybe not such a big deal but when he weighs 1,000 pounds, this can do you some serious damage if you happen to be standing in the way. And it won’t be on purpose, they can’t help it. Ours was not a mean horse in any way – much the opposite, he was a sweetheart – he just had no idea where he was putting his feet and occasionally he’d fall totally out of the blue, on perfectly flat, even looking ground.
I would try to treat it if possible because you don’t want a horse to end up in that kind of situation where it becomes unsafe to handle on the ground. It’s heartbreaking.