At the time I thought it was made to appeal to the tastes is mechanical typewriter users who were still very common in those days. I just had a cheap BTC foam-foil one which was really nice actually but did need a full take-apart and clean every year or so. But the touchwas so much lighter than the model Ms at my dad's work.
So there are mechanical components and it mostly feels mechanical, but there's a membrane underneath it all that's what actually triggers the key presses.
It's kind of a pedantic argument, I guess? But they do say that "technically correct is the best kind of correct", so YMMV.
It feels very very different than a mechanical key switch, to the extent that I love Model M's, but I'm generally meh about mechanical key switches (not enough auditory or physical feedback), a really good rubber dome keyboard is preferable to me over a mechanical key switch keyboard.
With a Model M, I type less harshly than on any other kind of keyboard, and thats because the keyboard gives me an auditory and physical feedback as soon as the keypress registers (back pressure rises right up to the trigger point, then it drops again after and then rises again right to the bottom out point). I regularly will bottom out a mechanical keyswitch keyboard, I never do on a Model M, and only occasionally do so on a rubber dome (it depends on the keyboard).
I've used enough mechanical key switch keyboard that have issues with key switches binding up, that I dont care for them, I shouldnt need to worry about lubricating my keyboard ;-)