Canon law does not invalidate marriages where there is no objective chance of conception, Canon law is not forever, it does change, but in this case it does not agree with you. Ever since it was acknowledged that sex for pleasure was licit in marriage, and from then on conservatives have been rolling a bolder up hill against the inevitable. Analyzing how younger people, including Catholics, feel about this issue has not changed that trajectory. Since the Church cannot fail, it will have to change, as it has for 2000 years.