I Google'd and Quora says that in the old days, hatchbacks were just built worse than sedans, and thus handling was better on the sedan. Most well-built cars would be indistinguishable on the track these days, though.
However, where I disagree with you is "in the minority." I look around, and there seem to be WAY more sedans than hatchbacks (in the U.S.) More on the roads. More options to buy. More on the dealer lots. Most people prefer them. Though I personally cannot imagine why. I owned exactly one and it was an excellent car to drive* and an infuriating car to use. So many basic things just do not fit inside them. I wish sedans were in the minority.
Ironically I have a similar story... in reverse. I went to test-drive a Civic Si, and ended up buying a Fit. (The Si was fun to drive, but the e-brake dug into my hips. The Fit wasn't as fun to drive, though it grew on me over time. But it was comfortable for my 6'2" frame.) Of course, being an Si, it was about $5k more than the Fit.
* It was an Acura TL-S 6MT, of course it was a delight to drive. Not because it was a sedan ;)