You seem to confuse the life of a grad student and the life of a tenure track professor trying to keep their lab running. They're not the same, not even close. Unless you are/were one, or were married to one, or have actual data proving that academic professors spend the majority of their times in useless meetings, your argument holds no water. Comparing reading papers for undergrad courses or some masters experience in some compsci lab is just naive at the level where you are not even aware of a different plane of existence.

The biggest proponent of "you only need to work 9-5 and can still be a successful professor", Cal Newport, himself walked back those statements somewhat after he started going tenure track.

I'll give one corollary though, which is that there are some very successful professors who actually don't work that hard. I am friends with one; they're just simply not human. I remember reading from the same textbook with him and he finished the pages 3x faster than me. So the only way you get away with regular life in academia is to have a super human brain. The rest of us have to compensate by putting in the extra hours. It's not healthy, at least not for me, which is why I chose to leave. But many do it. And continue to do so. It's arguable if their lives are worse or they don't mind it, but it's not arguable that they are just morons who don't understand time management.

I disagree with your idea that, because something can be done for 12 hours, it should not count as “work”. You also say reading is important, and yet seem to omit it when asserting that a grad student’s day of work can be compressed into 1-2 hours of useful work. I think the problem with what you’re saying is that it relies on a very abstract notion of “useful work”. I certainly can bust my ass for 12 hours at a problem and not accomplish anything, thus having done no “useful work” that day. If you ask me, I still sure as hell worked 12 hours that day, not 0. So the 60-80 hours workweek is a thing no matter how much “useful bits” there was in my week, and I believe it is still very accurate to call it so and to say that grad students are working hard. The 60-80 hours workweek is not a myth, unless we use your own weird definition of what counts as a work hour. No one means that when they're talking about how many hours they work.

I also don’t believe for a second that a mere mortal can pay attention to lectures or read papers for 12 hours. Personally after 5 hours of lectures I can’t pay attention anymore, and it’s a similar for paper reading. Most people I know are like that, and frankly I don’t believe you can actually attend 60 hours of lectures a week in university given the scheduling constraints.

Here is my transcript: http://www.hervature.com/Zachary%20Hervieux-Moore%20Transcri...

Look at Fall 2015 where I had 10 courses worth 32 units not counting the project course where the credits are awarded the following semester. call it 35 units. Roughly, a 3 credit course consists of 3 hours of lecture and a 1.5 hour tutorial. The courses I took that have more than 3 credits typically have a lab component that adds an extra hour.

You are correct that I didn't "attend" every single hour of those. But it just further proves my point that just because you're sitting in a room designated in your time table, it doesn't mean that you are inherently working. Instead of going to those classes, I used my time effectively and studied (not necessarily in the classroom) for a normal 8 hour day. When I say useful work, I don't necessarily mean that something is produced. Like you say, sometimes you need to find dead ends before finding the correct path. That's useful. Yes, you can work for 12 hours in one day. It's just not sustainable. A 80 hour work week implies one of two things:

1) You aren't working as much as you think. Go to the gym. Hang out with friends. Enjoy life.

2) You are about to burnout. Stop. Go to the gym. Hang out with friends. Enjoy life.

If you want to keep perpetuating that you need to be in your building for 60-80 hours to be a good grad student, you are directly contributing to the mental health issues seen among grad students.

Well you read me wrong! I absolutely agree with you that working insane hours is, well, insane. It only personally happens to me in short bursts. I’m only stating that many grad students work crazy hours. You’re right in questioning the productivity of those hours, and also questioning how healthy this culture is and it’s certainly not my goal to spread the idea that, to be a good grad student, you must drive yourself insane. Just because it’s not the right approach doesn’t mean that those students do not work those crazy hours. It is a myth that it’s necessary/a good idea to work this much to succeed, it is not a myth that a lot of grad student do 60 hours of work a week.