100%
Came across this stat which backs up your assessment: if the season ended today, Luka would be in the top 25 all time players for single season usage rate.
Of those 25 highest usage rate seasons, only 1 player has ever even gotten his team to the Finals.
That was Allen Iverson with Dikembe Mutombo in the box to 1) eat up all those offensive boards--130th best offensive rebounding season all time--and 2) anchor the defense--140th best shot blocking season all time.
So, Dikembe, AI and Larry Brown were able to make the heliocentric gimmick offense work just this once in a very weak East and they still got beat pretty convincingly in the Finals. Still, if there's anyone out there who can do the same for Luka, that would start to get interesting. As constructed, there are 3 or 4 teams in the West no amount of Luka magic is going to get Dallas through.