Unlike Rekieta, Perry had the humility to admit he was a slave to alcohol and drugs. He had been clean and sober for some time and had helped a lot of other people recover, even turning his Malibu mansion into a sober living facility for guys in recovery.
Nick isn’t suffering enough yet to admit he’s fucked. He doesn’t think he’s subjected his kids to enough bullshit yet to clean up his act, so there’s more
drunk parent trauma coming for those five innocents. Even if he does someday admit it to himself, he lacks the humility to admit it to another human being.
Nick will never, ever be able to stop drinking. He knows this, which is why he’s going all-in on Dax’s “If it feels good, do it, even if it’s an underage girl” shtick. His oldest kids are no doubt more mature than Nicholas at this point.