Well sure, if we can make completely safe in a completely uncontrolled environment(floating in the ocean), small, mass producable by automation and operated wit

Well sure, if we can make completely safe in a completely uncontrolled environment(floating in the ocean), small, mass producable by automation and operated with no staff fission reactors, everything would be fine. Currently any one of these features is either still in its infancy or not even being attempted at all. Expecting a reactor with all of them to show up in time to compete with renewable and conventional nuclear seems fanciful at best.