If my workload means I consistently have to put in more than 8 hours a day, it's my responsibility to report that. I have a contract for 40 hours a week, I'm not a slave.

A lot of folks here haven't actually entered the real world yet.

It is your duty to at least state how much work you already have and let the boss decide what to do.

I had a boss who acknowledged it and told me that it's fine if i'm not too accurate for couple of things.

Not saying anything, burning out and just delivering shit work non-stop isn't going to help either you or the employee, your job is to do your best and your boss has to figure out the rest.

Although i have to say i quit that job, because doing half-assed work is nothing which fulfills me.

Idk, that's a very core part of our company's culture.

I'm a SWE at a manufacturing company, so I'm certainly in a privileged group. However, the whole company has been pushing the narrative of empowering individuals to say no (i.e. the andon cord at Toyota). And given how frequently it's brought up in company emails (esp. in incident analysis communications), I have reason to believe it's actually being done at the plants. Our company's #1 stated priority is safety (due to the nature of the products we produce), and saying "no" is a huge part of that. We as SWEs have complete power to say "no" (we make our own estimations for work), and I believe our manufacturing workers have a similar ability to manage their workload.