For decades nearly every racer in nearly every discipline of bicycle racing has used some form of foot retention. Are they all just wrong? Are they all just stupid followers of "fashion"?
Toe clips came out over 120 years ago. In all that time nobody has figured out that it doesn't work?

If you don't want to use foot retention that's fine, nobody cares. But some of us have used various forms of retention for many years and not necessarily because it's "faster" or "more efficient".