I don't think there's much commercial value to Giant Sequoia wood, Fossil - may be one reason why the Big Trees have survived. In the 19th century, explorers found the Biggest Tree in the World among the sequoias, and they cut it down. They took pictures of themselves using the stump as a dance floor, and transported the trunk around the country for exhibition.

Take all the trees, and put 'em in a tree museum
And charge all the people a dollar-and-a-half just to see 'em.

There is a drive-through redwood tree on private property on the Avenue of the Giants on the California coast. Yeah, I paid my fee and drove through it...