The big honey companies microfilter not just to remove pollen (which as the article states makes the origins hard to trace). The big reason is that Americans won’t buy honey that’s crystallized. Ultrafiltration can delay or prevent crystallization. The supermarkets would be stuck with a ton of unsellable crystallized honey.
The folks at food Safety think that if it has no pollen it’s not “real” honey, I think that’s a bit extreme.
It is possible though to adulterate honey with HFCS, in which case it’s not honey. HFCS and honey are very close chemically, a water solution of fructose, glucose, and a few other very minor constituents.
The big reason is that Americans wont buy honey thats crystallized.
Nothing a little warm water can't fix.