I agree that there are so many things involved in creating the sound of bass that to say flats are best is oversimplifying.
What is counterproductive is some generalizing that flats are muddy, dull, lifeless and rounds can cop any flatwound tone while flats are a one trick pony.
I'm all for people using rounds and good for them if they are able to cut through the mix. But I find "cutting through the mix" to be a never ending battle for roundwound users, as evidenced by all the threads on the subject.
The "
I need an amp/cab/bass/string/effect that can help me cut through the mix" threads that are so prevalent here on TB are a result (IMO) of using roundwounds.
There is a quality to rounds that make a bass sound more like a guitar or piano. Nothing wrong with that and I happen to love that bass tone too. But, think about it...rounds make a bass sound more like a guitar or piano and then we spend the rest of our time trying to stand out among guitars and piano.
I'm not against roundwounds or the users of them. I'm against the decidedly oversimplification and generalization of flatwound strings because it is counterproductive.