shit man, i'm a four time drop out if you count me dropping out of high school and three times out of different colleges. academia is for theoretical shit. theory and application don't always align, fuck, most of the time they don't. applying theory is a whole other story -- don't @ me about the dichotomy in this statement.
CO2 can and will produce significant yields. @Aqua Man laid it out. It's not an additive one just throws in, and those bags and buckets and homebrew solutions are nowhere near equal to what a grow that requires CO2 supplementation to produce, e.g. sealed room running high EC, high PPFD, high VPD. If everything is not dialed, then CO2 is a wasted investment.