The core of my band we are 3 best mates and we all write songs. Then we have two other friends in the band who are really talented but don’t contribute for their own reasons.
Each of us come with an idea (I demo in garage band, they both play their songs acoustically). They both are much more musical than me and I can’t sing, but still occasionally write lyrics. But I’ll lay a full demo down to put across my idea. They’ll tweak chords and whatnot, to make it better.
So, we’ll present an idea and if we are feeling it, it usually develops from there.
All very democratic. We got bigger things to fall out over.