Once trees die they will release all that CO2 back into the atmosphere anyway. And trees will naturally die. Then another tree will grow in its place over time.

It's not a permanent storage of CO2 unless we cut it down and bury it or build something long-lasting with it.

I don't think that's true, how does "all the CO2" get released back into the atmosphere? During the decomposition of wood there are a lot of bacteria, fungi, worms, etc. that feed on the carcass of a dead tree. It doesn't just "evaporate" into the atmosphere...

The bacteria, fungi etc. emit CO2 as part of their metabolic process, just like you and I do.

There's also carbon sequestered in the soil. Decomposition doesn't end up with the entire tree evaporating.

It's great that 95%+ of the people we consider experts in these fields don't matter because CO2 is something plants breathe? Famously you can never have too much of a good thing. Impossible to overdose on water as we all know.