As Bitcoin grows in popularity, the number of users will increase from the current level of ~200 million. Within a few years we'll be having billions of users. And if Craig Wright is able to control at least 10% of them, it will give him an enormous amount of power.
You're giving Craig far too much credit here. Most of the "support" that BSV enjoys consists of bots, and then there on a much smaller scale are some imbeciles of human beings too weak minded to figure out that he is a scam. BSV army is very similar to XRP where the wealthy backers finance this fake sense of reality.
We have people who believe that the earth is flat. And there are tens of millions (or even hundreds of millions) who don't believe in the theory of evolution. When we have such low IQ people in this planet, it is not very surprising for me to find sizable number of individuals who would believe that the criminal Craig Wright is the real Satoshi Nakamoto.