It is a good example. If Draisaitl's success was "the McDavid effect", then his production would fall apart when McDavid is hurt. It didn't. He had 13 more points than McDavid with only 7 more games. I don't think its fair to suggest that it's all "The McDavid effect".
Your good example is to take a season where McDavid had the 2nd most points and only played 7 fewer games than Draisaitl, 7, and say "look McDavid doesn't have an effect!" lmao stop it.
Just for comparisons sake over the last 2 years I am bringing up Willy here, because their even strength production is nearly identical. Willy has played 3 more games in this time.
Nylander and Draisaitl both have 89 even strength points
Nylander has 42 even strength goals, to Draisaitls 29 even strength goals
Nylander has played almost exclusively with John Tavares in that time. The difference in their overall points can literally be attributed to the insane amount of PP time Draisaitl gets and the amount of ice time he gets with McDavid.
Imagine you straight up swapped those two C's 1 for 1, what do you think happens to Draisaitls production ? What do you think happens to Nylanders production ?
Draisaitl is an elite player no doubt, but like I have said multiple times. He's in the category of guys like Nylander, Rantanen, Kyle Connor, Marner, and not in the category of guys like McDavid, Mackinnon, Pastrnak, Matthews.
His production is heavily inflated because of McDavid. The same way Hyman is having career years. The same way a legitimate 4th line plug Patrick Maroon, scored 30 goals playing with McDavid.
Trying to suggest McDavid doesn't have an astronomical effect on his teammates and linemates is a straight up joke. No player in the league comes close to him, and for that reason yes we do need to address the McDavid effect when it comes to any player that plays with him.
If you seriously want to evaluate Draisaitl as an individual you have to look at what he can do when he isn't glued to the greatest player of this generation and a guy who can legitimately be the 2nd best player of all time when it's all said and done.
If you want to fool yourself and keep beating your chest about how Draisaitl is a top 5 player in the world and bla bla, then go right ahead. But everyone outside the Oilers organization can see it. It's back up by both the eye test, stats and even the analytic nerds.