We also model behavior, such as paying bills on time or biting nails under pressure. This is a form of learning that is great when it's something you want to teach, and not so great when it's something you still do but don't want to condone in your child. It seems that the best we can do is to be the best version of ourselves we know how to be, communicate honestly, and be as aware as possible as far as teaching by example goes.
It's in the Genes, Darwin!
Relax, You're Doing Just Fine
So your child may have wisdom about deep life questions that you still struggle with, and that does not make you "less than." You gave them their starting place, they are another branch of your ancestry and family wisdom. You do not need to feel shame if you find yourself learning from your children later in life more than teaching them. You do not need to feel inadequate if you don't know the answers to all the questions they ask. They have a new understanding based on the gifts they were given by you that isn't dependent on their age, but rather the development of your ancestral line, continually evolving into the new and yet unknown.