The M9 is not a beginner camera, because it's not good at shooting the things beginners like - and need - to shoot.
It's terrible to shoot running children with.
It's a terrible sports camera for field sports.
It's a terrible wildlife/birds in flight camera.
In fact, it's terrible for all the exciting action subjects beginners like to photograph.
Good photographers though, understand good photos are a function of the photographer, not the subject. A good photographer can make interesting images of a sink full of dishes. And the sink full of dishes isn't moving anywhere. It's just sitting there, among the trillions of other daily details that normally go unobserved, unexpressed.
The Leica M is a camera for visual poetry - the everyday, boring things we don't normally notice. These are essential parts of our lives and define it far more than the occasional exuberant color and flash. The decisive moment is within the mundane, predictable, everyday. If you can predict it, because it happened a million times before, then you can be ready for it. The M9 rewards visual preparedness. To repeat a lately overutilized saying: go where the puck is going to be, not where it is. Be prepared to shoot what will come, not what's in front of you. Unless, like most of the world, it's static and relatively unchanging.
The M9 a terrible f/1.4 "portrait" camera.
But it excels at f/11 portraits where lots of context and location, lights, scene, LIFE, is included with a 35 or 28mm lens. Or even wider!
And that brings me to the final point: it excels at shooting with wide angles. The beginner wants (and needs!) to isolate. The M9 doesn't isolate well - it wants to include ever more! As more is included the stakes are raised. Working with "the entire room" is inherently more difficult and easily turns into visual soup. We teach beginners to isolate - because they have to start somewhere, not because it has some sort of inherent value. It doesn't. But it's a starting point. One which is, IMO, better served with a small DSLR with a fast 80-90mm (or 50mm for APS-C) lens.
Of course, in many situations shooting is reactive; there's no getting around it. It's no longer acceptable to return from a PJ assignment in a war zone and come home with a handful of excellent shots. Editors want hundreds, if not thousands, to choose from. AF, AE, and zoom lenses are required tools. But the same PJs, when they have time to stop and think, when it slows down and they don't have to shoot reactively - will reach into the bag and pull out the Leica. This is what will be used to capture the everyday, mundane aspects of life: the storekeeper sweeping piles of cartridges off the sidewalk in front of his store, the kids on top of the debris of what used to be their home. The stuff that communicates mood and mind.