According to this study, "Public sector students outperform for-profit students on nearly every measure, suggesting that the overwhelming majority of for-profit students would be better off attending a public institution. But what if attending a public community college is not an option? Our results suggest that many for-profit students would be better off not attending college at all. On average, for-profit certificate students do not generate enough earnings gains to offset the debt they incur....
We find that the earnings gains of for-profit students are substantially lower than the gains for similar students in the public sector. For-profit students are 1.5 percentage points less likely to be employed after leaving their program; if they do find work, their earnings are about 11 percent lower than those of public students."
https://www.brookings.edu/blog/brown-center-chalkboard/2018/02/09/gainfully-employed-new-evidence-on-the-earnings-employment-and-debt-of-for-profit-certificate-students/