People just don't care about those small differences. (Since solutions of pedantic version pinning or vendoring are known, anyone who doesn't adopt them clearly doesn't care that much.)
Or you can have all the devs pull images built by a central CI system, but you'll still have package differences creep in over time.
Or you can have all the devs pull images built by a central CI system, but you'll still have package differences creep in over time.