The powers that be keep changing how conspiracy theorists are measured to hide the true rate of conspiracy theorist-flation!!!1!1!1!!
Joking, but also not joking, back in the day a conspiracy theorist was someone who believed that something was explained by a literal conspiracy with literal conspiring going on. Now every Tom, Dick and Harry that thinks a press release isn't telling the whole truth gets to call themselves one. The reason the definition got watered down was for exactly the reason you state, various people found it useful to apply that label much more broadly.
Joking, but also not joking, back in the day a conspiracy theorist was someone who believed that something was explained by a literal conspiracy with literal conspiring going on. Now every Tom, Dick and Harry that thinks a press release isn't telling the whole truth gets to call themselves one. The reason the definition got watered down was for exactly the reason you state, various people found it useful to apply that label much more broadly.