So what if it is corporate greed? The principle of substitution itself is based on greed. I'm acting in what I think are my own best interests. For better or worse, whether better or not, whether more risky or not, the lenders apparently have come to the conclusion that 3rd party inspectors are a reasonable substitute for "appraiser did inspects" for some assignments. Even if only on a relatively limited basis.
Not only that, but going forward their experience with these is going to accumulate and the data is going to accrue. If it comes to pass that there is no significant increase in losses that much is going to be self-explanatory. The critics are really going to be hating it if the lenders actually turn out to be right.