Not giving the user choice is a form of not respecting the user when talking about basics such as "don't save a document which came in a normal format into some proprietary nonsense unusable outside of an Apple device". This is actively hostile design.
> If I open a document or spreadsheet in the default installed apps, saving them will save them in the proprietary shitty Apple formats
Do you mean Pages/Keynote/Numbers?
Since these are not 1:1 (neither on feature nor in concepts) with MS Office/OpenOffice opening such a file is by definition a lossy import, so saving in the original format would be destructive, both with regards to the original contents being lossily converted to Apple app concepts and any Apple concept specific change made after opening being lossily converted to the original format.
This is not user hostile, this is saving the user from the impedance mismatch between software that organically grew from Multiplan and software that's been designed from the ground up.
Now, the Apple office suite being "shitty" is largely your personal (and the way you phrased it, judgemental) opinion, I personally prefer the Apple office suite any day to MS Office/OpenOffice/GDocs.
