Did you know that Jabari had a better 2018-19 DRPM score than a bunch of guys that many of us would have been happy to put into our PF hole?:
JaMychal Green, Saric, Portis, both Morri, Crowder
This is not to say that Parker's reputation for poor defense is wrong (his defense is truly bad). Nor is it to say that DRPM an accurate barometer of defense (like every other stat, it has severe problems). It's just to say that maybe we ought to look more closely into lots of other guys' defensive shortcomings as well.