I'd just rather split the money on 2 players who earn half of what Lauri earns. Gives you more flexibility and your team is less top heavy. If you compare Lauri's numbers to John Collins:
Lauri Markkanen 19 PPG, 5.9 REB, 1.5 AST, 0.7 STL , 0.4 BLK, 34.6 % from 3 on 8.5 attempts - 42 million with the salary going up
John Collins 19 PPG, 8.2 RB, 2 AST, 1 STL, 1 BLK shooting 40% from 3 on 3.7 attempts - 26.5 million with the salary likely going down slightly
and don't get me started on Ainge wanting like 2-4 first round picks for Lauri, while Collins would cost a couple of second rounders