Qualitative depend variable: OLS analysis?!

I’m a bit confuse…

In the Schweser videos, about qualitative dependent variable (logit, probit and discriminant models);

they say that we can’t use OLS analysis for this models

and in the Schweser notes;

“the analysis of regression models with qualitative dependent variables is the same as we have been discussing all through the topic review. Examine coefficients using T-test, determine the validity of the model with F test and R2 and look for serial cor, hetero, and multicollinearity”

Thanks for your answer!