> there are no problems like this in academia (at least not CS) because it's absolutely impractical (re graduation, tenure, etc.) to set out tackling problems which are intractable.
There's a difference between problems that are intractable and problems that require "grinding and radical unproductivity when the problem really is that hard". Maybe the problems in CS are easier. In math, many of the problems are very much of this flavor, and the point often isn't to solve the original problem but rather to use your investigation into that problem to discover new techniques or more tractable problems that you can solve. Of course, the pace of publication is far slower in math, so I'm sure this is a factor in the choice of problems.
On the other hand, I do mostly agree with this:
> are you also one of those people who takes cold plunges every morning? this myth is what perpetuates the same horrible relationships with shit advisors. it's not supposed to be suffering. it's supposed to be challenging. there's an enormous difference.
Agreed, there should be a difference. Unfortunately, in many modern PhD programs I'm not sure there is much of one....