“Quality” is subjective, so you’re correct that it’s not about quality. A tool designed with a planned lifespan of 100 hour lifespan is just as much a product of engineering as one designed to last 10k.
Responsibility though is very much is a central component of capital E Engineering. The modern profession in many ways is a direct response to big newsworthy engineering disasters.
When you hire a Professional Engineer there are minimum safety standards that they must meet. They can't charge you less and waive their liability. They are essentially required by law to "sell you some responsibility".
Not at all. It was over a longer period than 4 years though (BF4 had a remarkably long life) and included sessions of over 40 hours straight at my worst.
Nobody can be told what FSD is. You have to see it for yourself.