If you go through some of the threads there's one wish that is constantly appearing when certain ideas about game mechanics meet with objections....make it optional!...let us toggle it from the game menu and so on.
Now, I don't remember too many games that I played recently, in fact I have a hard time remembering any game that would allow players to toggle so many gameplay mechanics on and off as the player pleases. Seriously, the developers shouldn't spend their time on developing certain mechanics and then placing additional layer of code (even if it's minimal, but it's still work) to let people choose if they want to sleep, eat, drink and take a piss in the game. Or not. Or maybe just eating. Or just pissing. Or sleeping, with a pink pillow giving +10% to stamina restoration.
Lets get real. CDPR are game developers and artists with certain vision of the game. Sorry for the party pooping, but so far not too many of their ideas for game mechanics resolved around simulating every little activity that people do in real life. So far, and that is since 2007 when the first Witcher game was released, CDPR made their name in the industry and among gamers around telling STORIES and that is their main goal with Witcher 3 and CP2077, repeated in every possible interview available.
As Dragonbird pointed out, things suggested in this thread are not little but actually big things, affecting gameplay in important way. And personally I oppose these ideas, as they would just make the game a tedious mess IMO. There are many other ways CDPR uses to increase player's immersion in the game world successfully and so far they never used these suggested here. CP2077 is supposed to be a game with a story to tell, not a real life sim.
Now, looking at the success of Arma's mod DayZ I would say that there are people that find such mechanics enjoyable. And that's probably why DayZ started as a mod, because the core of Arma wasn't survival. If there are modders that take CP2077 and make a survival mod/game out of it - be my guest, hell, I would probably play it. But including such mechanics in the core game is not bringing enough benefits to justify the development effort.