While looking at resources invested is necessarily a great measure of difficulty, it is somewhat indicative, yes.
you mean "isn't"? Though there is no indication that a lot was invested, so doesn't give you the measure (my comment was about the availability of resources, not of their actual use)
you mean "isn't"? Though there is no indication that a lot was invested, so doesn't give you the measure (my comment was about the availability of resources, not of their actual use)