I agree, but in practice this is rarely the case for multiple reasons depending if we're taking about PhDs or postdocs. For PhDs, they've commited to a long pr

I agree, but in practice this is rarely the case for multiple reasons depending if we're taking about PhDs or postdocs. For PhDs, they've commited to a long project, so might feel defeated for quitting. For postdocs, it's true that they could likely get a job if they left, bit at the same time, the may be half way through a role and want to pursue a job in academia. Switching careers is not an easy thing to do, and that's essentially what you're doing when leaving the academy. In addition, it's worth noting that computer science is very diverse, including broad subfields such as HCI, so it's not necessarily correct in your framing of CS.