Good points. But, and using your LAN comparison: if my wifi's guest network used some custom method (let's also consider it a proprietary method for the sake of comparison) to, A) impose an arbitrary limit of uploading files no larger than 100KB (and/or have the files heavily compressed to meet said limit) while B) offering no clear method of communication to the non-guest users why this limitation is occuring (or even exists)... I can imagine both guests and non-guests would quickly become irritated and start bickering among themselves as to whose fault this arbitrarily-imposed "local network file sharing problem" should be blamed on.

I don't think it's the guests fault for being arbitrarily limited. And I wish the non-guests could be told why the limitations are imposed.

Because no one behind a trillion dollar company should (in good faith, at least) concern themselves with restricting non-Apple, shareable files to be seen as "just slightly, technically accessible to Apple devices".

These constraints are clearly imposed on Apple users (by no one but Apple) to alienate "non-privileged, non-Apple customers" (them) from the "privileged Apple customers" (us).

And Apple's goal on "finding common ground" seems to be: do not negotiate with any proposed solutions as the division we are creating is intentional.