It's not nonsense at all. Hochuli was literally quoting the rulebook. And he IS the judge of whether Micah could have held up or not. Highlights in red.
RULE 12 PLAYER CONDUCT
SECTION 2 PERSONAL FOULS
ARTICLE 11. ROUGHING THE PASSER.
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(a) Roughing will be called if, in the game official’s judgment, a pass rusher clearly should have known that the ball had already
left the passer’s hand before contact was made; pass rushers are responsible for being aware of the position of the ball in
passing situations; the game official will use the release of the ball from the passer’s hand as his guideline that the passer is
now fully protected; once a pass has been released by a passer, a rushing defender may make direct contact with the passer
only up through the rusher’s first step after such release (prior to second step hitting the ground); thereafter the rusher must
be making an attempt to avoid contact and must not continue to “drive through” or otherwise forcibly contact the passer;
incidental or inadvertent contact by a player who is easing up or being blocked into the passer will not be considered
significant.