The problem is, at least historically, that if Draisaitl doeesn't play with McDavid, he has had a wide selection of Ty Rattie, Alex Chaisson, Drake Cagguila, Toby Reider, Dominik Kahun, Milan Lucic, Jesse Puljujarvi, Jujhar Khaira, and, most recently, Kailer Yamamoto to drag around. If you put Draisaitl with real top 6 players, like Nugent-Hopkins, Hyman, or Kane, he produces without McDavid. Chiarelli gutted the team so badly that only recently have the Oilers begun to amass more offensive depth.
In contrast, Kucherov has always played with at least one of Point or Stamkos as well as a stud defenceman like Hedman to bolster the offence (in comparison to Klefbom or Nurse). So, by your logic, why isn't Kucherov punished for playing with stars? I'd be interested to see how he would perform with Kailer Yamamoto on one side and a centre like Ryan McLeod.