Not really. When it comes to reading I'm basically just a blackhole that consumes anything and everything regardless of quality.
But the main reason I don't care about ratings is that everyone does them differently. For some people good = 5 stars, bad = 1, Etc, Etc. For me 3 stars = good, but has some issues. 4 stars = great but has small issues OR I just really enjoyed the story (Which means I have reread it). 5 stars = Perfect OR I just enjoyed it so much I don't care about the flaws, OR I was just in a really good mood when rating a 4 star story. Then sometimes I rate a story 5, if it has potential but change it later. And the type of story it will also change the harshness I rate.
So basically, understanding a rating is mess cause everyone has their own taste.
If I ever start writing, I'm not sure if I would care about the rating my stories would get, cause it would be mostly doing it for fun. But who knows, that could change.