I think this is partly a philosophical, and partly an economic, question.
On the philosophy of moving dirt, I am an agnostic. I have played many natural courses shaped using the underlying land features, and also many in which I learned (before or after playing) that much dirt had been shifted. I have a natural preference for linksy style courses, so tend to favour the former, but I have no ideological objection to the latter.
Providing it results in a good course.
Natural features do not necessarily make for authentic golf, nor dirt moving for artificial golf. Some in each category are god, bad or indifferent. I think it is best to judge the course on its merits rather than the purity of the process. So, I guess in GCA ethics terms, I am a consequentialist rather than a deontologicalist.
On the economics, I am not sure that a lower cost of building will necessarily result in a more affordable course. I assume the modern pricing model is to charge the price the market will bear, regardless of actual costs to be covered.