Is investing in private prisons unethical?

It’s a serious question I’m struggling with. Some companies like Core Civic are doing constructive stuff such as bringing in job readiness groups to help prison reform. Conversely, these companies are accused of exploiting prison labor.

Where I struggle is that many incarcerated people will be incarcerated anyways, especially these days in the US with the new administration. Whether it’s right or wrong there will be an increased demand for these services which will be met by private firms.

Moreover, the federal government already has unicor which employs prisoners to build furniture and license plates, which has ethical nuance as well.

Any perspectives for or against would be highly appreciated.