You are on to the issue yourself. First and foremost we need to stop releasing CO2. That in and of itself is not enough, but the most important bit. Some countries (a lot?) has enough tree cover to offset a huge chunk of their CO2 emissions today by trees. Some might even be CO2 neutral, had it not been for the use of wood for fuel. Therein lies the potential. And this is already a mature industry with market dependencies well established.

Resembling this CO2 uptake with man made processes will require a monumental investment in both monetary and energy terms and the output will be pitiful when the net effect is calculated.

So slamming the effect of trees, which does not require any of that development and investment costs because it doesn't solve the entire problem, because it isn't a silver bullet is rather short sighted. It is already today the best tool we have to sequester carbon from the atmosphere for cheap and with a comoditiezed biproduct.