Drouin has scored 50 points just twice in his nine year career and the last time he did it was the 2018-19 season. His point totals the last four seasons have been 15, 23, 20, and 29. Doesn’t sound like “probably 50pts” to me.
It is certainly fair to question whether Drouin is able to stay healthy and play enough games to actually hit that 50pt threshold. But he's clearly capable of playing at that
pace at least. Particularly if you put him in that right scenario to just "leach" off other dynamic players, with offensive zone starts, powerplay time, etc. The years where he has scored like that, are the years where he's been in a situation that "pumps up" his production in a way that gets the most out of what he can offer. If you're going to get "value" out of him, you have to play to his limitations and put him in that cozy situation to succeed. The same way Tampa did back in the day.
You need somebody like MacKinnon/Rantanen/Crosby/Malkin to really get that out of Drouin the way Kucherov did. But the skill is there to complement a star player like that and compile some points. It's not a very compelling skillset for Drouin...but it's also not a capability that just any ol' $1M player is going to offer.