At this point he is worth the risk. Like others have said, if he proves himself, you found a QB in the 5th round. If he shows to be a pain AT ALL, you cut him and move on. You can't do that with a 1st or 2nd round pick. I believe it's only happened with a 3rd rounder 1 in the last 20ish years. But 5th rounders get cut all the time.
He and Gabriel are opposites so far. Gabriel apparently interviewed extremely well and came off as extremely smart. Sanders interviewed extremely poorly and was a pain. But Sanders has a lot more potential. I do agree drafting 2 guys is very odd, but when Kenny Pickett is currently listed as your backup, its not hard to just cut him either if the 2 rookies look reasonably good.