Like parent was saying - that is true of all problems in practise since the earth has finite resources. That doesn't make complexity classes a useless concept.

In other news, no point in needing pi, because perfect circles dont actually exist in the real world.

I don't think people are trying to claim it's unimportant in general, to anyone, they're suggesting that it's completely unimportant in this conversation about how slow and boring championship chess matches are.

Yes and saying a problem is finite is also kind of meaningless. That narrows it down to everything except infinity. I also did not say that chess is NP-hard, it was an analogy.