If true, it could mean that everything we understand about the chemical causes of depression could be wrong. The Human genome project is yet to be completed. But making a car go faster on less fuel and costing half as much is nothing. It's tinkering around inside the scaffolding of the box we already defined. I don't know where you have come to this conclusion.
Science doubts everything, including that it has solved a problem.
I look at the main areas of human inquiry and get get real exited about the things we are about to start learning. Of course there is. There is only one scientific method. Think of an idea. Test it again.