Hard Seltzer

[Demy]

For a long time I have heard of "hard seltzer" especially in homebrewing places. I've never done one but I like to explore my surroundings. As far as I know, it is fermented sugar then flavored and carbonated, similar to a beer. I was wondering, wouldn't it be better to combine our neutral with water and flavorings instead of using the sugar wash as it comes out of the fermenter? It would be cleaner, without fermentation off-flovor. I don't know much, I'm interested in your experience, thank you.