It is hard to burn down redwoods and sequoias. Park burned, might be good for the trees.
Actually there are certain trees that require fire/heat to allow for their seeds to begin initial growth. I want to say either the redwood or the sequoia are among them..but it’s been a few years (few...ok decades) since I was reading that stuff.
And your correct with your statement as well. I’m sure some will be lost but many will sustain and the burnoff is actually needed to clear away some of the undergrowth.