CEGEPs are kind of a combination community college/last year of high school/first year of university. They are teaching institutions, not research ones. US community colleges can demand Master's degrees but not Ph.D.s to teach. Mostly people with Ph.D.s who can't get real academic jobs exit that market, not go CC.
Anyone who is actually teach a CS course at a CC or a CEGEP and who is doing it as a full time job is doing it for non-pecuniary reasons, inclusive of being incompetent but having attained a qualification sufficient to teach.