You ascribe this to maturity, and while I agree, I think the more fundamental issue is one of developer talent and ability. Bright ideas from developers lacking

You ascribe this to maturity, and while I agree, I think the more fundamental issue is one of developer talent and ability. Bright ideas from developers lacking these is not just unhelpful it is an active hindrance. Dealing with bad ideas takes time and energy, and people with little competence are often the most vocal. As for maturity, what works the best in my view is to hire people of equally high competence but with different levels of experience. You need those people with 30 years experience, just as you need those right out of college. The former provides wisdom and the latter enthusiasm and optimism.