The social dynamics in academia and industry are very different. And even the nature of the work is different - there are very different expectations about software quality, repeatability, etc. for even a CS researcher and a software engineer in industry, let alone for engineers in other fields. (Some amount of software engineering practice has been creeping into CS academia from shared points of contact, like open-source projects or students taking industry internships, but there's still quite a gap.) You're essentially not rewarded for your operational excellence at all in academia. You're not expected to have writing as a primary skill in industry. And so forth. Even if we ignored social dynamics, the day-to-day work is very different and attracts different people to start with. And the means of recognition and reward are also very different.

I would expect a limited effect difference if I believed that the primary reason people stay in/leave a field is because of their inherent aptitude towards the fundamental nature of the work - but I don't believe that.