It’s true. But he could have done something on an emphasis over 82 games, especially knowing that weakness, but failed to. Our perimeter defenders are bad. But there’s no way they are this other-worldly bad without these strategies implemented and ingrained over time. There are no defensive rotations. It’s not ideal but allowed for the blow-by because Rudy is there. Nobody rotates to cover Rudy’s guy or the open man because Quin has planned for two lines of defense (1. the perimeter, which Quin cedes, and 2. Rudy). This is also why we struggle with defensive rebounding in the clutch because we’re used to the 40 minutes played during 82 games where only having two defensive layers works. When teams get more creative, there’s no adjustment, presumably because he’s looking at the numbers over a large sample (40 minutes of 82 games) and saying it just doesn’t make sense, instead of looking at 8 minutes over 82 games for a more accurate sample for playoff correlation.
Tl;dr our perimeter guys are bad. But they’re not this bad. It’s learned behavior. After a prolonged Gobert absence, their defense did improve in fundamentals.