including carboxylic acids, hydroxy carboxylic acids, sulphonic and phosphonic acids, aliphatic, aromatic and polar hydrocarbons, fullerenes, heterocycles, carbonyl compounds, alcohols, amines and amides, which are all common on the Earth.
My emphasis.
You are dead wrong. Murchison has amino acids like isovaline that are very rare on Earth. Its amino acids have nitrogen-15 content unlike that of Earth-based ones. Fullerenes and phosphonic acids are not at all "common on Earth." I'll bet a sixpack of Red Stripe that you can't tell me what a "heterocycle" or an "amide" is without Googling them.
"The wretched world lies now under the tyranny of foolishness; things are believed by Christians of such absurdity as no one ever could aforetime induce the heathen to believe." - Agobard of Lyons,
ca. 830 AD