This is to answer the original questions in the post.
Why isn't brandon iron cultivating the next hetero male star. This is pretty simple to explain. Male performers work their way up rank. They start shooting for less well known companies and if they prove they are great talent, big companies start to sign them into exclusive contracts. Good example would be Brandon himself, he started out shooting for less well known companies and worked himself up into Platinum X. Platinum X is not going to pick a guy of the street and develop him because he has a big dick, He must already have proven himself at various other companies and have done a number of scenes.