> Why not?

Truth is that the work and complexity is not that divorced. Honestly, the work in academia felt harder, though more fulfilling. Industry work hasn't made me have to really think deeply. If anything, I've heard most of my coworkers (at multiple companies) say something along the lines of "we have to move so fast that there's no time to think." Given that (multiple) managers tell me I'm "too slow" just because I'm not producing tons of lines of code (I'm neck and neck with everyone on milestones), I understand what they're talking about. Industry has a working mode of "do first, think second" while academia often thinks first. The reason is really because it is a lot cheaper to think first.

[0] It works enough for some demo to some person

[1] One example is I beat a company's fancy giant transformer based image detector with a scrappy CNN that took only a few hours to train. They were excited for all of 1 day and then wouldn't let me do the same thing to the transformer model (which would have had a bigger impact). Fun fact, my boss also loved to tell me about how dumb academia is because they never do anything useful and how industry makes all the real advancements.