Oh I think it is a universal rule, at the end of the day the majority of people will prefer a balanced sound over an un balanced one.
Who stated that perfection meant balanced sound? I didn't. Majority of people I know and enjoy music don't need "perfect" equipment. The question here is 300$ vs 1000$, not 10$ vs 1000$. I honestly think we have to be crazy expecting that at this level equipment will hamper your enjoyment. I can enjoy music on my 10$ ear-buds just as well. Sometimes. Sometimes not. Could make an exception here for larger scale Classical music ... maybe.
But the devil is in the details. Language is soft and bendable ... words are easily interpreted this or other way. If you are in pursuit for better sound ... than I can agree. If you just want to enjoy music, than it is better you don't even think about equipment.
Sooner or later you will loose a lot of time and money searching for better HPs and reading forums. There is not much time to listen to music even without that