Feel like that's the MO of most big, skilled forwards. Malkin (prime and now) and Draisaitl are the exact same way.IMO this is why he's so frustrating. If the effort was ever there on a Lehky sort of level, Rants might be a consistent 60g 135p player. When he gives a F, there are probably less than 5 players more impactful than him. But when he doesn't, he can bleed chances. Kucherov is the same way, just in a different style.
Also he can have 3 of those shifts in a game and get 3 points... while his other 20+ shifts were utter garbage.