There IS a media type you choose when feeding the media in the printer. This happens almost every time once it detects a media being loaded.
I attached a screenshot to show what I'm referring to that is what you "should" be selecting to match the paper if the computer end doesn't match properly to the media. "IF" you have the same media loaded with the correct black, than it should be fine for future prints as long as the settings (media type) on the software end (via printer driver) is correct since it can default when you do another print (unfortunately).
So, in a way, you're correct that you don't have to touch it, but you do need to select the media type if it's not correct otherwise. If it's matte paper on printer and you select luster on the computer, the printer will get confused and may try the printer option and possibly change the black based on the type selected upfront vs what the drivers are set for. Yes, it can be confusing, but it makes sense too.
The driver will default each time you go to print, so this isn't correct. I believe it's set to Premium Photo Paper Glossy automatically unless you have the option to save the settings and select that option each time you go to that spot at the top (for Windows users).
The manufacturer of the printers want to make sure you get the best quality print from all of these settings available. Match settings up on the ends (printer and computer) and should be fine!