My first real job was working 12h shifts at a global company's internal IT helpdesk.

The shifts were alternating day/night periods on an irregular schedule.

I have worked 60 hour weeks, 5 days in a row, and that shit can fuck right off, I can't even imagine working 70 hour weeks.

I suspect this guy either has worked like crazy to build his company up from the ground and believe that his employees should feel the same drive as he did as the owner, or that he has never worked close to that much in a week, and is just looking at a pie chart of the available hours in the day.

I am glad for the job I had back then, even if the hours sucked, I learned a lot, and it made me apriciate the free time I got when I started working normal hours, but I would not wish those hours on anyone, they killed my social life, and even seven years later I have not recovered it.