I would argue that “insiders” in this case are the people who listened to Jared Leto directly.

Jared Leto was one of the main producers of this movie, so he was the one selling himself as the star. “My cult will love it!”

But.... Why? The only role I can remember him ever being decent in was fight club and American psycho, and that's mainly because it was enjoyable to watch Jared Leto get his shit rocked. Every movie I can think of that he's been in a lead role has bombed.

Suicide squad? Giant turd Morbius? So bad it became a meme Tron? Apparently awful, I'm not gonna watch it 30 seconds to mars? First album was okay, maybe the rest of their music would be better if he'd stop trying to fuck 15 year olds backstage.

He never was!