Cavitation damage is hard evidence
The cavitation damage may or may not be relevant to this incident, but it is incontrovertible evidence that at some stage in its life that pump has had to suck harder than it should. Or put another way, at some stage in its life it has found the fuel supply system under performing.
An analysis of the pump population will indicate how rare or common it is for the fuel supply to under perform.
We know that for it to critically under perform is a rare event. To estimate the probability of this rare critical under performance, it would be useful to know how much non-critical under performance occurs, and how it correlates with aircraft history.
Then we might be able to determine how and why it happens, and how often the under performance becomes 'nearly critical'.