Good, then go pay for a second opinion - if the lender allows it.
The RE agents should inform the buyers that if the appraisal or valuation falls short, a buyer can opt to put up their own funds for the difference. If a buyer lacks the funds or refuses to put them up, then why is that the appraiser's fault?
I suppose an AVM can be consistently right , or wrong.
The problem with the logic here is:
1. If the first appraiser screwed up, the chances are, from the borrower's point of view, that the second one could screw up as well. In fact, a certain paranoia could set in, where appraisers are perceived as forming a conniving mafia.
2. The point being that appraisal and appraisers are not trusted. The news media is full of stories about appraisals that are 100's of thousands of dollars apart.
3. So, a second appraisal is definitely a gamble from the point of view of most borrowers.
4. And don't imagine people are generally willing to part with any more of their money than necessary, even if "necessary."
5. Whatever, currently there is not much to do about it, except provide an appraisal that, in the first place, you are very sure can be defended in court.
6. And from what I have seen, the appraisers who lose lawsuits are optimistic types who don't think about the downside. They may be very smart (for appraisers) but they are too optimistic. They are about pleasing their customers. They know it. But they can't help themselves. In so many ways, they are too reckless and optimistic. THEY JUST CANNOT HELP THEMSELVES.