If the giant sequoia is dying out, why are there tens of thousands of seedlings and saplings?

Thousands of giant sequoia seedlings sprouted after a fire swept a grove in the Sierra in 2021. Will they replace the behemoths that died or become extinct?
Orange County Register

Spend time in the presence of California’s awe-inspiring giant sequoias

California is home to the largest trees on Earth, the giant sequoia. Standing under these massive organisms, you can’t help but be filled with wonder at how something can be so old and so enormous, ...