Part of the problem here is that there was a warning for it before the move that resulted in choking him out/pinning him. Yes there are a lot of moves/positions that are illegal or stopped when ruled "potentially dangerous", but when someone consistently and repetitively performs these during a match they can be DQ'd. Doesn't matter about the intention or not.
Knew a kid back in the day that was DQ'd for too many headlocks without an arm in the hold. Most of the time it was because his opponent knew they could slip their arm out because he didn't lock it in tight enough, would draw the penalty every time. After a few a those in a row during a match, DQ'd because of too many penalties.
This match seems like a clear drop by the officials. Gave him a warning earlier, didn't stick to their guns, and to me the most important part is they forgot their primary role as keeping both athletes safe. Yes they need to call a proper match within the rules, but the "potentially dangerous" call is so subjective they had every right to stop the match. And based off of their warning from earlier, they should have.
/rant
