Ah, this is a dangerous line. There's a lot of people who think that hiding information gives more depth, but much of the time, it just adds frustration. I don't know if you've ever played a RPI, but those are pretty much the most frustrating games I've ever played. They're made of people who insist on never showing numbers, never learning the code, "figure it out IC", "don't worry about the numbers, it's all about the RP".
Hidden information (when you want it) is one of the most frustrating part of any game. It encourages elitism, and encourages hostile responses from elitist fans when some people actually do look for the numbers.
It's not always about complexity either. Football Manager and Trophy Manager are two of the most detailed football management games and they give every football player's skills in numbers. There are dozens of simpler ones who refuse to give the skills in numbers, and give it in text instead, like "abysmal", "good", "excellent". Most of the players end up translating these text indicators into numbers, and it's actually more jarring to the game realism to find that "horrible" is not as bad as "terrible".
Long story short, if you do it wrong, it actually worsens the "mood" of the game and increases the difficulty curve greatly.
Now to argue towards not using solid numbers, my game doesn't use it either. That's because my stat system is designed in such a way that 60 strength means that you can lift twice as much as 50 strength. Showing the number is far more confusing than saying that a 50-str character has "average strength" and a 55-str character is "very strong".
DF also works this way because.. hell, imagine if we could see how many HP the heads, eyes, toes had. DF is bad enough giving unnecessary detail about gabbro chairs and cat leather. If it showed how much HP everyone's toe had, it becomes rather annoying. And if you did tell everyone that the imp had 62 HP, they would be confused when a 5 damage arrow through the brain instantly killed it.
So, in conclusion, just show the numbers until you find a very good reason not to. People will find the hard numbers when there is any reason to, and not giving it to them only makes them more annoyed and they'll post the hard numbers on the internet anyway.