This is not correct. It’s been proven using electron microscopes that generic photosynthesis uses a quantum mechanical process inside every chloroplast. As a photon lands inside the microstructure an exciton hops through a superposition-network of chlorophyll molecules until it finds the low energy reaction center where it splits a water molecule into charged ions, used in further processing. This photon to ion process is nearly 100% energy efficient which would be totally impossible without the biochem exploiting quantum effects at room temperature.
I believe that it is very hard to capture these types of effects because measuring quantum systems impacts them, but I think (fully speculatively) it’s a matter of before we find more and more biochem systems that exploit quantum mechanical effects.