I know, and I would prefer that 4 was considered well above average, and 3 was, well, average, but still decent.My point is that 4s aren't a low score, and a 4.4 or 4.2, despite not garnering that coveted H, means most readers liked the story quite a bit. It means quite a few even loved it.
But it isn't that way, not here, not anywhere else on the internet. If an Amazon product is rated under four, it probably has issues. Not because just under 4 is theoretically bad, but because reviewers take 5 as the default, and take points off from that for problems. 3 should be the default, and add points for above and beyond things.
So here, it's almost a 1-10 scale, with the meaningful part of the rating coming after the 4. Not quite that, but under 4 would be pretty disappointing, and most stories at that rating are in fact sub-par.