I see you give this advice over and over, but the fact that you won't even consider that there might be exceptional cases seems to be a bit too rigid of a mindset to me. I don't want CO2 in my low light tank, like I said, and the fact that you haven't seen something in 20 years doesn't mean it isn't true.
Respectfully, your advice didn't work for me and it's not clear to me that it's 'fact' that CO2 correlates so closely to algae.
"The fewer our wants, the nearer we resemble the gods." — Socrates