I felt Tatum's (relatively) poor shooting was partly (mostly?) a consequence of sometimes failing to make the right play. I'll give an example of what I mean:
https://videos.nba.com/nba/pbp/media/2024/04/21/0042300101/261/a73248f5-edd3-c296-3257-b0e9c86908d9_1280x720.mp4
The issue with this play is you have White run along the baseline creating a potential 2 on 1 on the weakside, and you have that second defender up top in the gap. This is how Miami has more or less defended Tatum for 3+ years and he still isn't attacking this the correct way. Tatum needs to hard dribble left and engage the second defender, read the third defender (Jaquez in this case) on the weak side and make the pass to Porzingis or the skip pass in the corner to Brown. Otherwise he's allowing Miami to essentially guard two players with one.
Now, you can argue not being able to make that dribble and pass are what led to all those turnovers against Miami in the past, and that's what he's trying to avoid. I agree. But the solution isn't to get Drew Hanlen and go work on your 3 point step back/side step jump shot. The solution is to learn to be able to make that hard dribble to the left, read the third defender, and make the appropriate pass without turning the ball over.
Making the right play there might not show up in the box score at all. It's not really about points or even assists. In this particular example, It's about punishing the defense when it tries to cheat in this way by trying to defend two players with one player on the weak side.
And once he starts being able to make that play, then that second defender maybe doesn't get into the gap quickly enough because they have to honor the pass and Tatum can get to the rim.
Now, you can argue I'm holding Tatum to too high a standard. Most players (including maybe Anthony Edwards!) can't make this particular play. But that's the kind of play the primary shot creator on a championship team needs to be able to make with reasonable consistency.