I wonder why developers think they need special protections that other workers do not have. It is not uncommon for waiters to work 12 hour days, with 1 day off for wages far lower.
The shit they're talking about violates labor laws in the US and is done 6 days a week. No one is physically capable of that for a non-desk job for very long so if anything, that's not true because its simply unsustainable.