Not being familiar with her, that isn't telling me anything.
It seems like you're implying she's written exceptionally shoddy papers.
But on the other hand she could also just be exceptionally honest -- one of the very few researchers to retract papers later on when they realize they weren't accurate, as opposed to the 99+% of researchers that wouldn't bother.
Also I would imagine that retraction rates might vary tremendously among fields and subfields. Imagine if a whole subfield had all its results based on a scientific technique believed to be accurate, and then the technique was discovered to be flawed? But the retractions wouldn't have anything to do with honesty or quality of the researchers.
Having been in academia, having felt the pressure, knowing reproduction is not sexy and takes time away from "actual experiments", knowing some theories or groups have cult-like status, knowing that not having papers means not getting a PhD, despite working hard, being smart, knowing that this is (experienced as) very unfair, etc... I'm very sure that 4 in 10.000 is the tip of the iceberg.
We need more reproduction. Or have some rule: Check all assumptions. Yes, it's a lot of work, but man will it save a lot of fake stuff from getting out there and causing a lot of useless work.
Having considered it I reckon it could be due to some systemic abuse of the process. Or it could be that she is working in a field where there is a high uncertainty rate.
Why don't you explicitly state which you think it is?
- The overall retraction rate is 4 in 10,000.
- Most researchers go their entire career without a retraction
- She now has 4.