For arguments sake though, yes, the Catholic church does have some unethical rules! Notice in this case, a person can voluntarily choose to join and obey catholic rules, or not. Thus, right to life is preserved by the individual and relative to catholic ethics, it may indeed by unethical relative to catholics to break the rule you voluntarily agreed to. It happens so much they have a word for that too... "sin"
Notice how it would be unethical if the catholic church claimed everyone must follow their rules *even if they don't agree to them*. What that would imply is that the catcholic church has the right to your life, and THEY may choose to loan it to you, or not. Which of course, is obviously unethical.