Creativity and courage are useful for unschooling, and they are traits that an unschooling environment nurtures, in both kids and adults.
Consider why something is or should be. The range of useful and acceptable options is very likely wider than you first thought. What is the purpose? What's the principle?
If you're tempted to say no, out of habit or convenience, first think "why not?" If you don't have an honest, good reason to say no, perhaps it's time to say something like...
Let's try it, or
I'll help you, or
Okay, yes.
SandraDodd.com/principles/
photo by Sandra Dodd
(chain guards and other details, India)