Dunno why you're downvoted, but you're hilariously correct. HFCS doesn't contain sucrose (the disaccharide), but contains the two monosaccharide components of it (glucose and fructose). Functionally speaking, eating sucrose vs. HFCS (55:45) has the same metabolic effects; your body instantly cleaves sucrose into the two monosaccharides. So yeah, HFCS contains no sucrose but it tastes just like sucrose and makes you fat just like sucrose.
Fructose tastes a lot sweeter than sucrose. This is something I never understood about HFCS. If it's sweeter, wouldn't it lead to people consuming less? In the UK there are quite a few low calorie drinks that use only fructose for this reason.
It's also "Low Sucrose" because it's been processed to make the Fructose/Sucrose ratio closer to that of sugar. "Unprocessed" corn syrup inverts the ratio.
I'm being downvoted here because the prigs on Hacker News (see https://paulgraham.com/woke.html) like to say that HFCS is evil and anyone who doesn't hate it is beneath contempt. A very predictable reaction.
