I understand your point, but there is more to the logging roads than meets the eye.
First, as you give credit, they do serve as sufficient firebreaks for lots of small, natural fires.
But second, they allow us to bring in heavy equipment into remote areas. It's one thing to send in some jumpers, quite another altogether to be able to drive in bulldozers. The new logging roads give us more areas into which we can readily bring in the heavy equipment. That stuff usually can't be airlifted in. You've got to have a road there first. The more logging roads, the more equipment that we can bring into more remote areas.
Third, the logging roads provide a quick starting point for setting backfires (or expanded firebreaks).
Don't get me wrong, we'll still see lots of new fires this year (some set deliberately)...they just won't be as big as last year, in my opinion (due to the new logging roads that have been built because GWB cancelled the enviro-nonsense that was stopping them).