That's the thing, though, right? They don't play in a vacuum, so if they play Tatum 40 minutes 1 night & 30 another night because that's what the game calls for, that's better than playing him 35 minutes every single night.
If literally the only 2 options are 38 minutes every game for 73 games or 34 minutes per game for 82, then I suppose it's a close hypothetical.
The point I was trying, & probably failing, to make is that for the most part game flow should dictate these things, within a certain capped range in the regular season.
If Tatum is playing a bunch of 40 minute games to try to eke out close wins, give him a day off. If Tatum is playing a bunch of 30 minute games because of blowouts, don't give him a day off.
I think these decisions should be made based on the flow of the season & not predetermination.