Extraction Is Highly Optional
Just a quick reminder: Failing to extract does not result in a game over! As long as you get the objective you are golden. Extracting is a tiny bonus to payout.
That being said, the only way to get samples is by extracting with them. All im saying is the moment things go south and you decide to leave the samples behind after dying you are (mostly) only doing it for fun.
Granted, that is fair, but still. At that point you might as well just do a side objective you didn‘t get earlier or kill an outpost or two.