There's no machine learning model that is truly objective. They're all biased due to their, usually human generated, datasets. It's impossible to account sufficiently for every scenario in a training set, so these models just give an objective veneer to the biases of those that created the dataset.
This phenomena is well documented with predictive models for crime.
Many arrests happen in low-income areas. The data on arrests skew towards those areas. The predictive models are trained on that data. Using that data, police make more arrests in low income areas. Those arrests get added to the data set Rinse and repeat.
Replace police, arrests, and low-income with anything and it's still true
For example: Company Leadership, promotions, race