Yes, "it's all about the lenses" should probably read "it's all about the lenses that are available in M-mount (or screw mount with an adaptor)". Leica, Zeiss, Cosina and others. There are LOTS of options, and some of us nut cases even have more than one lens of the same focal length because they "draw" differently.
Crack? Not really. It may be financially debilitating, but it's healthy.
The but those Leica "dealers" ... first they'll sell you one inexpensive little lens ... and then you're hooked.
