Yes, I suspect many of us have worked crazy hours when we were young. I recall one stint where I worked almost 60 hours straight (no sleep), got a couple hours sleep, and then worked another 20 or so. 60 hours a week was not uncommon for me at all. Once I got past 40 and got married though...
I worked full time (35-50 hours/week) for many years in a high volume grocery warehouse with no A/C in hot Alabama while slowly going to college (2 to 3 courses per quarter) and getting a BS in computer science. Looking back in hindsight, the years of physical work in young and influential years build character. In my 50’s now it was do-able to handle the year 2020’s many, many software changes, working 50-60 hours/week for a few months. But I couldn’t do it every year.