https://xkcd.com/1205/

This comic ("Is it worth the time?") is categorically incorrect, because it assumes a static system. Instead, when you make something take less time, you can do it more often. Sometimes, much more often. See: Jevon's Paradox. You would never have known that CI/CD was a useful strategy since you didn't optimize your build because you only did a full build when you released.