It doesn't provide the tools. Again, point out to me in the rulebook how I bribe a guard. The only answer is "ask your GM." That's not a tool, it's an invitation to make a tool up.
And this is fine! Jeez, I say this and it keeps being met with incredulity and hostility. This is the fundamental design goal of D&D -- it's exactly why you keep claiming that you can just add stuff to D&D to do whatever. The argument isn't that you can't, it's that the system doesn't help you do any of it -- that it's fundamentally thrown up it's hands and said that it's players are going to make it up on their own anyway, so why bother. I mean, they bothered in 3.x. They bothered to a different degree in 4e. They chose to go back to not bothering in 5e. This is a clear design choice, and not a bad one. Just one that means that 5e doesn't support a lot of things -- it just lets the GMs get on with it.
The dirty side of this is that GM fallacy I mentioned -- that it's considered a failing of a GM to not successfully hack 5e, and the answer is usually a form of "get gud." I mean, you saw that play out right here with
@Hussar's low-magic issues and how
@dave2008 responded to it -- first by saying how easy it is, then by providing rather simplified advice for doing so as if it was just that easy. There wasn't a moment of, "huh, yeah, I can see how that might be a challenge, maybe you are better off with a different system." Nope, 5e is the solution that needs to be defended, and failure to make 5e work is a failure of the user, not the system. Never the system. It's a weird sort of fetishization.