Look at it another way: The author was sure unlucky to have based their research on shoddy data from a trusted colleague. And it took guts and integrity to react in the way they did.
Not because I don’t care about spiders, but because the first is entirely within their control, while some hypothesis finding the data to support it comes down to luck far too often to use a single case a meaningful measure of an individual.
Her technique was presumably (not my field) otherwise quite good and she didn't know at the time the source data were bad. Apart from her willingness to follow up to the query on an old paper, her approach to followup was excellent. And she seems to have learnt from the experience.
All in all this sounds like what you want from a good scientist. After all once you have tenure, you can just ignore all that "old stuff" if you are so inclined.
As far as not getting the position: there are more people than tenure track positions these days so "luck of the draw" is also pretty significant.
(I hope that in reality there's a lot more to the author's research than the retracted papers, but of course in such a competitive job market, every bit helps.)
Look at it another way: the author sure was lucky they found out about the problem after they were securely in their tenure-track position, and not just before.