I was in academia. Not just a grad student, but achieved the phd and did a post doc. I don't regret any of it. It taught me many invaluable lessons, all of which have been useful in industry starting a company.
My impression of industry so far: they don't get progress. They don't get innovation. They have problems, but they they don't understand them and are unable to commit resources to the procedures that are needed to solve them.
Only the very biggest of tech companies like Google, Palintir, Apple, Facebook, are able to tackle the really hard problem. These are the problems that you can not make an estimate for in terms of completion. The majority of industry will not even entertain this class of problem.
Academia, too, has a lot of problems. I left because of the publish or perish mentality. I liked to work on hard problems, and had some successes, but overall it is the numbers that matter not the difficulty. There are an equal number of politics in academia as in industry, though they are different in academia.
In industry, politics often involves a lot of incompetent people in high places following paper work procedures that do not support their supposed cause, while in academia it is more a lot of infighting over government grants and insultingly simple metrics like the number of papers published.
In short, the author of this post is full of ignorance, and I am only slightly less full of ignorance in that I haven't achieved tenure in academia, and only have several years in industry helping to run a company. None the less, what I learned in academia in terms of the science of computing, it was invaluable.