Yeah, those are completely fair points regarding your "enough is enough" thoughts. In particular, your thoughts are fairly selfless vs. my own "I want more of what will make me personally" happy sort of thoughts.
To a certain extent, I think your comments are weakened just a little bit by the strong likelihood that Cyberpunk2077 isn't going to be a stand alone game but the first in a franchise though. Unless CDPR themselves are going to be done with the IP after this game, then there's more SP content that could be/could have been added in and anything that is done on the MP side really is something that is NOT being done on the SP side.
I won't complain to much if we get a Witcher 3 level of content and experience and then they do the MP mode. I'll still wonder what 20 hour expansion I'll never get to play that I'm missing out on, since I won't touch the MP, but if they deliver a Witcher 3 + Expansions level game then I'll be more than happy to just shrug and let the MP crowd have their icing on the proverbial cake.