Why does Methylated spirits cost more than white vinegar if it's also made out of ethanol but with one less chemical reaction?
because things cost is based on what you can get away charging for them, not what they cost to produce.
vinegars food, nobody is going to spend a lot on basic food ingredient.
methylated spirits is a chemically sounding high tech liquid probably used by science or some shit. Its gonna be pricey
If you buy acetic acid in bulk it will be as cheap as methylated spirits, so it's more of an economy of scale issue however you are right in that plebs should wise up and buy concentrated acetic acid and water it down to what they need because it's the same fucking thing but 1000x cheaper than store vinegar.