I'll be honest in my experience a good idea comes from an individual who has an insight or sees a vision others can't. I've noticed these ideas can get refined

I'll be honest in my experience a good idea comes from an individual who has an insight or sees a vision others can't. I've noticed these ideas can get refined and filtered by group discussion and can go from good to great, but for me at least personally I don't feel like I can come up with good thought out ideas without spending extra time to think through them and understand them.