It's the person that desires to change the views of others that has the burden of proof.
The issue is justification of belief...which entails evidence. Creationists/theists are trying to 'spread the message' and get others to believe. Science doesn't care what you believe, especially if you can't demonstrate the truth of your belief, which takes evidence.
The evidence to evolution is more than sufficient to prove the reality of evolution. So if someone 'chooses' to disregard the facts, that is their problem.
