Of course, the author adds the end bit, about "do you want to be happy or do you want to achieve what you want", which ameliorates it a bit and makes it more accurate. But by the same token it makes it softer and murkier and less useful.
Then again, the whole essay is predicated by "these are simply the lies I tell myself to keep on living my life in good faith". I can understand where that statement is coming from, but then what use is it?
I appreciate the desire to put advice into the world, but too often I find it completely useless out of context. Or maybe even actively harmful. They're like Barnum statements that can be interpreted in all sorts of ways in any given situation.
I guess I just feel like we as a society need to stop taking advice from people based on their own personal philosophies, which have all sorts of self-justifying biases (regardless of how their life goes).