If anyone has been involved in any sort of internal data analytics this is basically what is expected to happen. Data that is used in a new way tends to turn up all sorts of limitations and soft points. Trump, Musk, etc should have been (read: probably were) well aware this was coming; for what it is worth they've surely seen it a few times in business life.

That being said, I doubt it is much of a factor. The strategy of hitting fast & hard is to bypass the unreliable data by triggering screams from the areas that are most important. In some sense, anticipating this revelation is why the strategy is chosen in the first place. Trying to do massive cuts slowly and carefully gets a few months in to the project then crumbles under the weight of unreliable data and analysis paralysis.