Feel that the job security part for CS is like an excuse for ppl who are less competence/have poorer performance as a safe heaven to keep their jobs. Corporates on the other hand has to be practical to weed out less competent and dead weights within the organisation - sth that CS doesn't really practise which leads to a higher level of inefficiencies and a bunch of farmers with no career aspiration and sense of mission.

Also the job transferability in CS is rather limited for generalist roles and in the event that one gets black listed; commit a serious mistake; immediate boss holds some prejudice; doesn't fit in with the team; and other office politics, that person would be stuck.