First, we're talking about the state of the technology and what it can produce, not the fundamental worthiness of the approach. Right now, it's not up to the task. In the earliest phases of those technologies, they also weren't good enough for for professional use cases.
Secondly, the number of hobbyists only matters if you're talking about hobbyists that develop the technology-- not hobbyists that use the technology. Until those tools are good enough, you could have every hobbyist on the planet collectively attempting to make a Disney-quality character model with tools that aren't capable of doing so and it wouldn't get much closer to the requisite result than a single hobbyist doing the same.