"If Earth's atmosphere was hydrogen-rich as we have shown, organic compounds could easily have been produced."
Mmmm hmmmm. Exactly how gullible does this guy think we are?
If you read correctly, this statement is a hypothetical. ie, IF the earth's atmosphere were hydrogen-rich, as we have shown, then organic compounds could have easily been produced. Photochemical reactions of hydrogen and carbon dioxide are in fact readily carried out in lab experiments. There's no reason to believe that in an atmosphere with high concentrations of CO2 and H2, that there'd be any problem carrying out similar photochemical reactions. The photochemistry involved in this process is very well understood.