Everybody leans on something. To imply that non-religious people don’t need a crutch is very misleading. Money, power, sex, drugs, alcohol, other people, and material possessions are just a few examples of crutches people commonly rely on. Even atheism can become a crutch if it becomes the rationale for the addiction to an immoral lifestyle. Christians are not weak for relying on God. They are stronger for relying on something other than just themselves. Christianity ultimately provides something no flimsy substitutes really can: inner peace, forgiveness and spiritual fulfillment.
We degrade God too much, ascribing to him our ideas, in vexation at being unable to understand Him.