Most, almost all, climate change "experts" think human activity is driving "climate change".
So their opinion isn't worth very much.
I'm going to say that if planting more trees isn't the solution, plant more climate change experts.
These people are driven by profits from the scam. No profits to be made if people just started planting trees, hey? So we need special machines, very expensive special machines to sequester carbon....as opposed to sinking more derelict ships, old buses, etc, to encourage coral reef growth and plant trees in regions where trees like to grow.
...not that we really need anything...we don't control the sun and we don't control the quantity of H20 in the atmosphere.