The problem is that over-promising and under-delivering, when combined with many documented cases of fraud, can be fatal to a field. After enough of this, the field may get a stink on it that never washes off. Ask the cold fusion people.
The field needs to get better about catching fraudsters, and start delivering results. Otherwise it will be defunded, no matter how eloquent people are. This may not be "fair" but it is the reality.