I totally agree with you. My iPhone 4 was stolen the other day, and I was using an application named GarageBand. I am very fond of this application and was gutted when my phone was stolen because it had all of my original songs on it, and I had just paid to get the full version.
I have an iPod Touch 4th Generation so I thought, I can just re-download it and everything will be there because it is the same Apple ID, however I can't get any of it back because this particular application insits on me having iOS7.
No one is annoyed that we can't get iOS7 because it's just something we want to make our phones look nicer, it's because we can't have the applications that we want because Apple have made them uncompatible with anything earlier than iOS7, even if you have previously purchased it on another device!
This is the main problem, sort that out, and no one will complain about iOS7 anymore.
It's all about the apps!
~Steph~ 16, UK