I wouldn't even know where to begin to respond to the first sentence.
Good, then don't. Obviously, CP/M is designed for generic platforms, which means, in part, it works with just about every media type, including 8" disks, 5.25" disks, 3" disks, micro-cassettes, etc. In fact, of the more than dozen CP/M systems I have, the only media type I don't personally have a system that functions with natively is 3.5" disks. My point, however, was a simple one. By the very early 1980s, there was a real effort to directly support the most common 5.25" disk formats. This was handy for those who couldn't connect with a modem, where connecting via serial cable was impractical, or for a variety of other reasons. Reading/writing to different formats was arguably the easiest way of transferring software and save files back and forth. As such, the Apple II platform wasn't well suited to that, since there was no way to exchange media except with other Apple II users on CP/M. That's all.