Yes – and that is tango reality here and now!
We can blather about the tradition of new leaders learning from the milongueros and not being allowed onto the floor or even through the door of the milonga before three years of practice, but that's another time and place, and out of sight is out of mind for most people – or at best, it's a quaint history lesson that's forgotten the instant the here and now of tango is on display. We can label classes and events as "all levels," "beginner," "intermediate," "advanced," "master," blah, blah, blah, but those labels have no formal, widely accepted definition, so the reality is that if you can afford the price, you can be there. And even if you set things up so that there's more history and structure at your school . . . well, you can't do much about YouTube, a competing school, or a random guy who teaches on the dancefloor.
So, people who have danced for less time or taken fewer lessons will see what's possible. And when they do, for the vast majority, those possibilities become one of their top motivations, their top motivation, or even their only motivation. That's human nature, and human nature is far stronger than tango traditions.
Tango teachers know all of this. They also know that someone can earn money promising to teach people who have danced for less time or taken fewer lessons all the many possibilities they see on the floor or YouTube – and that if it isn't them, it'll be some other teacher across town. So, classes are about "moves" because that's what pays the bills.
As for teaching micro-elements so that you can express yourself through improvisation, I disagree with this . . .
. . . because of course you can teach someone color theory, brush strokes, blending, and other micro-skills relevant to painting and they might eventually become an original painter, and of course you can teach someone the practical physical movements of playing an instrument, and musical theory and notation, and they might eventually become an original musician. Learning the micro so that they can compose the macro is how most artists become artists.
The micro-elements approach in tango is no different. Teaching prefabricated steps and patterns is less likely to create an original dancer for the same reasons that trying to copy Chagall or play Mozart is less likely to create an original painter or musician. Yet most beginners try to paint or play or dance the greats. Why?
Micro weigh shifts, displacements, pivots, and changes of axis, distance, level, and relative position aren't individually impressive to look at, and might not be visible at all! Those who dance by stringing together these things as the music and their partner inspire them often execute one-off movements that they can't explain as steps qua steps, or even do a second time. You can't sell that to people who want to do "advanced" steps and "that thing I saw on YouTube"!
Leaving age out of it, I can totally see that.
I came up through a very traditional salon tango school where the teachers were strict about building up the complexity of steps, learning technique before steps that needed it, not letting us dance steps off the music, not letting us dance steps that didn't respect the line of dance, and so on. There were history and music lessons, there were drills, drills, drills, and there was pressure to dance at the práctica every week, ideally for a few years before going to the milonga. That is how I learned tango.
However, that school failed. It didn't get people dancing quickly enough. Over the years I was there, the classes had fewer and fewer people signing up – and at least two leaders mouthed off in front of us all about how slow progress was, meaning that far more said it in private, and even more thought it.
The micro-elements thing came later for me, in private instruction. Now I'm a moderately senior dancer getting asked about my movements on the floor, and I realize that approach is marketable only to other moderately senior dancers who are past group lessons and into private instruction. When newer dancers ask about my "moves," I try and fail to explain them, because "They were organic, in-the-moment things made up of practiced micro-elements, not steps or patterns that I practiced in the form you saw" isn't the answer they want. As soon as I say that, I can see all interest draining from their eyes . . .