It's just an example.
The importance of an argument doesn't matter for the severity of an error in reasoning present in that argument. The error might be unimportant in itself, but that it was made in an unimportant argument doesn't argue for the unimportance of the error.
Oh. I misinterpreted what error you were referencing. yea, you're right I guess.
Sorry.
This thread is for the discussion of Less Wrong topics that have not appeared in recent posts. If a discussion gets unwieldy, celebrate by turning it into a top-level post.
July Part 1