False “realism” is often used to justify things that are immoral. Right now in Ireland, people are trying to use it to introduce abortion. “Realistically, women travel for abortions, so we should make it legal here.”For anyone who believes in the authority of the Church to teach that contraception is a sin, “being realistic” IS encouraging sin.
Just because somoething is easy in the real world does not make it right. It takes it’s place with “arguments” such as “it’s the 21st Century”.