This is super important that Tyler Mane is talking about his breast cancer diagnosis because it's usually diagnosed a lot later and thus has a worse prognosis in cis men because most people don't know men can even get breast cancer.
This is an example of taking a point WAY too far. "Racism is prejudice plus power" can be a jumping-off point for examining the difference between racial prejudicing by the majority culture and the minority, but "racism is prejudice plus power so only the powerful can be racist" is nonsense.