Not sure how many games Luka has missed for not-unreasonable things like being shut down at the end of the season, or resting the occasional B2B, but by year the number of games played are:
72, 61 (75ish game COVID season), 66, 65, 66, 70, 22 (out of 49).
As comparison, a couple of maligned benchmarks:
Embiid: 64, 51, 51, 68, 66, 39, 13.
Zion: 24, 61, 29, 70, 13.
And a cheeky one:
AD: 56, 62, 36, 40, 56, 76, 42 (out of 47)
I reckon almost everyone would excuse Luka's overweight arrival for this season given the post-season and Olympic campaign would've wrecked him, and the fact that he's not exactly reliant on being in peak physical shape. But I can also see how a GM might be building to compete now and then watching a US$43m guy compromise recovery, jeopardise the campaign and think the best way to improve a Luka/Kyrie/Klay backcourt defensively involves moving the biggest block of money to strengthen elsewhere. Kinda loses sight of the fact that said block of money is likely pre-prime, frequently carries an entire team, not agitating to be traded, literally a prodigy, etc.
FWIW, Pelton on ESPN has rated this trade as an A for the Lakers, and an F for the Mavs. Haha.