It's very well put, but the problem is that the exact same logic is used to justify
removing automatic-attacks as affecting automatic-attacks, thus:
Automatic-attack as a concrete attack, then not, but automatic-attack in the conceptual sense (a set of any possible attacks at the site), then yes. Removing an automatic-attack is in that sense modifying the automatic-attack.
The problem is that ICE made it absolutely clear that this logic does
not apply to their definition of affecting an automatic-attack.
Or to look at another implication, if we accept creating something as equivalent to modifying something, then:
These MPs can not be modified by a hero or minion resource event (e.g. Rumor of the One, Tribute Garnered, Sentinels of Númenor, etc.).
Would mean that non-stage resource events are not worth MPs to Fallen Wizards, as they are modifying the MPs by creating them.
The game is flawed, but this does not mean it cannot be loved.