Johnny is such a nice guy so if he did that he’d have a really good reason. Or maybe the man deserved it, or…. Or….
No one thinks Jonny Depp is perfect by any means, he's a spoilt movie star who likes pretending to be a rock star with his musician friends. He was also a complete fool led by his dick to leave his wife and family of longstanding for a young woman.
It's pretty much the norm in Hollywood circles, still highly humuilliating and painful for Vanessa, it's almost karma that his new bride ended up being far more emotionally stronger than him.
He didn't know what hit him with Amber, and it wouldn't have mattered if Jonny was young and the same age as her, Amber has a personality disorder which means she destroys whoever she comes into contact with, if that happens to be someone very close they will become a shadow of themselves, no matter how rich strong or powerful, she needs to win, that's the nature of a narcissist.
All this sympathy for Amber, she doesn't need it, she is an incredibly strong woman with little feeling for others, I've no doubt Jonny will go onto meet someone and fall in love as he did and was capable of with Vanessa, it's highly unlikely he will meet someone like Amber again.
Amber on the otherhand I can't see her in a long stable relationship for some reason.