Most people dont live on rabbit food . They mostly like to eat meat. Even if its just chicken . its the way of the world. Very few people can sustain a long healthy life with out true protein.
Cancer will consume you. I’ve lived enough to see it happen to most vegetarians or vegans .
Fish is no different than chicken . the real problem is the oceans are so polluted. The fish you eat now at some point will destroy you. They are poison these days.
Fish used to be a safe choice. But that was years ago.
Its not something you really should eat. Its just not. Until the oceans are clean .