Here's the thing with Lauri Markkanen...
For his entire career he's fluctuated between playing 50 and 66 games a year, with most of them closer to 50 and 52. Sure, Ainge may have forced Hardy to sit him for the tank last year, but he still only played 55 games. But that's not the thing.
He's on an expiring contract and can be had via free agency next year. Sure, he may want to max out with the Jazz, at which point he's maybe even less valuable in terms of what it would take to acquire him (assets, not salary). But then a maxed Lauri is questionable value. But that's not the thing.
He's never been in the playoffs. When he was in Chicago, they were bad. When they moved him, boom, playoffs. Cavaliers were bad with him. Next year when he was gone, boom, playoffs. Sure, that's not entirely his fault, but he don't impact winning, does he? But that's not the thing.
Here's the thing. At Chicago and Cleveland, he was around 14.8 ppg 5.7 rpg. (He was actually getting worse from earlier in his career.) At Utah, he is around 23.2 ppg and 8.2 rpg. What changed? Minutes went up and takes way more shots, about 2 more threes a game and 5 more twos a game. His shooting percentages have remained the same.
THAT is the thing. He turned into a single year All-Star (not last year) because his volume and usage went way up. He was still the same player, just more of it. On an actual contending team, one hoping for playoff runs, he's not getting the same amount of #1 option run. He's going back to those 14 ppg 5 rpg numbers. At best. With poor defense and bad assist rates.
He is VERY similar to Dejounte in getting a reserve All-Star appearance on the back of high stats on a terrible team, then becoming mediocre when he had to play alongside a better player.
Do you want to trade a lot of assets and pay $45 million a year for a guy who is getting you 14 ppg and 5 rpg? I don't.