Not sure I understand your issues. You should always be capable of navigating your music using CarPlay. I would only recommend using the steering wheel controls to skip, repeat, change volume while you are actively driving. Navigating CarPlay menus should be done by passenger or while pulled over in a safe spot.
As I stated above, he’s referring to the fact that some manufacturers limit one’s ability to search their entire catalog through the CarPlay interface while moving. Only recently played music or playlists are available to choose from in the music menu.
This forces one to go to their phone to make the selection which to me, is much more dangerous....and so frustrating.