Remind him of two important things about bodybuulding:
1. Bodybulding was invented by homosexual and bisexual men. The Male Body Ideal he so much obsess with is a homosexual concept of male beauty, conceptualised and practised by homosexual and bisexual men themselves in the very first ever gym in human history, the Gymnasium in Greece.
2. He dedicates his life and body to embody a homosexual concept of male beauty. He presents nearly naked on a stage and in photo sessions for people to ogle him and feed his ego. He objectifies his own body. He presents it as an object for other to ogle at. He could actually study and become a real professional, a doctor, a teacher, etc. But he chose what feeds his ego.
Homosexuals are not the invaders when it comes to bodybuilding. Heterosexual men are the invaders.