It's still interesting to listen to because no-one believes it. Take your dream job, dream home, dream car, and tell yourself that obtaining it will be bad for you.
Don't think so? Me neither. That's why I'm still chasing a philosophy degree and a career in the navy.
Why don't I think that's a bad idea?
Because sticking with a plan is the only surefire way to really understand the magnitude of that plan's stupidity.
Besides, in most cases your dream turns out more disappointing than harmful.
In other words, it's not always such a bad thing that what you want is bad for you, as long as it doesn't take your whole life to figure out you were chasing the wrong dream. If it only takes a decade or so all the better.
The only real problem with being a human is knowing that something is bad for you and wanting it anyway. Convincing ourselves to want a person or a thing even after it breaks down most of who we are is a talent unique to our species. We don't just follow a passion instinctively, we can dedicate a good deal of higher cognitive processes to explaining away a bad relationship or addiction.
And every single person has plenty of desires they know not to follow and follow anyway. That's the failing of humanity at its most simple. In the end I don't imagine its half as much a problem to end up chasing the wrong dream than it is to know you're chasing the wrong dream and to stick with it because it's too late to change anything.
When you go skydiving you only allow yourself two tries if something goes wrong. If you can't cut a tangled chute in you move on. You force yourself to get a new plan because you don't have time to try something that's failed already. If your dreams are on the timescale of 20 or 30 years, your life is at least as short as a skydiving jump relatively speaking. So the way I figure, you can have big dreams, but you need to know when they're not going to help you hit the ground softly.
In the meantime I'm keeping my plans big and short term.
Happy landings to all of you!