Evidence suggests the opposite: they would write a self-congratulatory blog post about it.
For example the work Google does on "de-biasing AI" is all about taking ML models and warping its understanding of the world to reflect ideological priorities.
That paper (and all other works in this space) are about population level inferences from the model.
My point is that the individual level outputs (which you'd need to accomplish what the OP was talking about) are essentially impossible to tune so precisely, given our current understandings of the models.
