That is very dangerous theory because there is a limit to what the carbon sinks can absorb. Plus with the large amount of deforestation going on not only are we producing more CO2 but simultaneously destroying those natural sinks that are supposed to absorb it.
I presume that one of those natural processes you refer to is the acidification of the oceans. Besides 25% of man made carbon emissions are absorbed by plants a similar amount by the oceans which leaves half of carbon emission in the atmosphere.
Besides 50% of CO2 taken in by photosynthesis returns to atmosphere through plant respiration. Of the remaining CO2 more than 90% is released through microbial decomposition and what remains is the actual land sink. If the CO2 rises it could that plants just release more back into the atmosphere.
What your doing is gambling with how much carbon the sinks can take. If you’re right then the carbon sinks will take more carbon if your wrong then you will be complicit in the destroying of our environment and for your sake I hope you can live with that.