It's not lazy when it's not your place to do something.
It's not your place to explain your penance?
You're the one who entered it into the debate...you're the one who entered this "sincerity" thing into this. Then when asked how we can determine if you are sincere or insincere, you appeal to imaginary authority.
Fact is, you're just looking to justify your own personal discomfort with faith, which is an abuse of faith.