Why would they need to look into Apple’s conduct here? Investigate Beeper for CFAA violations since they cracked into Apple’s internal APIs and ignored large chunks of their ToS in the process.
Of course Apple is going to shut down unauthorized access to their messaging system. They’d lose all customer trust instantly if they didn’t.
The vast majority of the popular accounts are not run by the women on the profile. Most of them pay friends or agencies to manage the page for them, they simply show up to photo shoots every now and then and enjoy the easy money.