I interpreted ForrestN's statement much differently: "it really, really doesn't matter what you accomplish." Given that emphasis, I don't think what ForrestN said is incompatible with your analogy.
The point is that the heat death of the universe means that some things, like the drive to "contribute to humanity" are not goals that are inherently superior to other goals, such as "cooking a beautiful meal."
This point is clear when ForrestN says "there's no reason to adhere to anyone else's values, or to feel pressure to do anything in particular. You should do what you want, what makes you happy, even if it's humble." Cooking a beautiful meal certainly falls under the category of "humble things that make you happy."
The point is that the heat death of the universe means that some things, like the drive to "contribute to humanity" are not goals that are inherently superior to other goals, such as "cooking a beautiful meal."
This point is clear when ForrestN says "there's no reason to adhere to anyone else's values, or to feel pressure to do anything in particular. You should do what you want, what makes you happy, even if it's humble." Cooking a beautiful meal certainly falls under the category of "humble things that make you happy."