Yeah, money can make you insanely comfortable, buy you the nicest things and give you some fleeting entertainment. But if your mind and emotions want you to feel like you're in the deepest, darkest shit hole on the planet, you will fucking feel it; there isn't any inconceivable amount of money that is going to help that. It's just not. That is internal and it is yours and yours alone.
But to an extent, you're right. There are people out there, without a single doubt, that have suffered immensely more than Bennington, went through the same experiences, and still have to kill and beg for food and pennies that will live longer than him and never once think of suicide. And y'know what? The two are completely disconnected. Every person has their own way of dealing, and their own choices to make regardless of their life circumstance.
It's meant to be a joke but there's a brilliant line by Louis C.K. that resonated with me and I randomly thought of it while being accosted by the insane amount of social media surrounding this...I'm paraphrasing here but it's pretty close to something like "Everyone alive are just people who decided not to kill themselves today". It's said in jest and in fun but when you really think about how much shit some people go through...it's true. He decided not to keep going...even with kids, a wife, and seeming riches. Money is just gravy, at the end of the day. I've lived poor and in the wilderness and I've lived in complete comfort (nothing like Bennington but at some point it becomes irrelevant), and if I was depressed when I was poor, it felt the same as when I was living without a worry. Depression does not discriminate.