Errr... nah... Apple does not stop at the OS. Apple owns ALL the same components. Apple devices can be locked to customized "skins" of the App Store, and disallow ordinary software installation entirely. In particularly tight-fisted scenarios, any device can be locked to Apple's productivity, creativity and coding apps (which are not all, admittedly, best in class, or even good). Apple devices can be locked to iCloud for storage, mail and messaging. Extended management tools also enable admins to configure secure enclaves, firewalls, VPNs, ipsec tunneling and peripheral connections.Yes, they can. The advantage that Chromebooks have over Apple for schools that are using Google Classroom, is that Google owns the OS, Google owns the browser, Google owns the search engine, Google owns the application. Apple stops at the OS.
It is easy to sell school district administrators on an environment where everything except the maker of the actual device is all within one infrastructure. A fancy Pages (or Powerpoint) presentation with lots of shiny baubles and beads will sway most school district administrators. Most of which are technologically challenged.
Case in point with the current district in which I reside. All the school board members were given/assigned/forced with new laptop computers to use during board meetings. One year later only one person is using the laptop, the others are back to shuffling paper.
All the parts are in place for Apple to replicate a truly tight silo, with very little left out, or left to chance. Question is why now? Apple's previous attempts at this were case studies in fail.