He has a baseline game that is present no matter if he's on or not, that game is still helpful to us even though it's not as helpful as when he's on. His off games, he's a lot less puck dominant in the offensive zone, but he still does the best job of anyone on our team of actually getting the puck to the offensive zone. His skating, hands, and IQ don't disappear even if the killer instinct does. His bad games are still better than someone like Johnsson's absolute best peak performance, you're at worst getting an above-average middle-6 winger on any given night. That's an ok trade-off for me when 75% of the time you're getting someone between a top-10 2nd line RW and an all-star level RW. If he didn't have off-games he'd be making 10+.
I'm not sure how to even answer this non-point. If you play Gretzky 1 shift a game, are you going to complain that it must be his work ethic causing the gap between his talent and his production level?