And then, they say "Why can't Catholics answer this question?"
Ridiculous.
Because they are not looking for an answer or even an opportunity to explore and educate, they are looking only for an opportunity to berate and belittle.
No answer offered or authored by a Catholic will ever approach the infinite perfection of the one developed in their own mind which features them as the epitome and God's pet.
A priest once told me that to achieve joy in our lives we need only look at the word joy and understand that it gives us the formula. Our priorities in life must be Jesus, Others, Yourself. It seems to me that the anti-Catholics start and stop at "Y" and therefore have no real joy in their lives. It is a shame they work so hard to ensure no one else has any either.