Earlier quoted context omitted.
The problem is the definitional issue is the foundation of many of their arguments. If you give in here, then it's much easier for them to convince you that something must be done. "There's not much we can do as a company to confront the white supremacist society we live in" sounds downright dismissive compared to "there's not much we can do as a company to support police accountability or any of the other myriad way…
I guess? Though I'm not sure that arguing about the name of the ocean is actually the easiest way to convince people not to get hung up on trying to boil it. Even when fuzzy language is directly responsible for sucking people into a boil-the-ocean mindset, I've never seen anyone actually succeed by choosing that plan of attack. Usually it just results in people talking past each other.
If a group of people trying to boil the ocean are convinced that the basin of the ocean is just a really big pot and argue that anyone who argues otherwise is a BAD PERSON obviously it would be great if we could convince them that the part where they're accusing people of being BAD PEOPLE for thinking differently is the real problem and reassure them that they can continue to believe that the ocean is in a really big pot.
Except that these two things seem utterly tied up together in their minds -- they learned it because it's stated exactly that way in many books and other media (you haven't read the nytimes best seller Non-ocean-pot-thinking Fragility?). They think it's as true as 2+2=4 because the theory's origins are academic and we must believe science don't you know?
Attacking the definitional issue seems doomed to fail to me as well, but I can't think of any other way forward that isn't worse.