It is so important to have a strong point of view. Let me repeat: it is so important to have a strong point of view. It needn't be as extreme as the one voiced in this ad, but you've got to stand for something.
If you don't have a point of view, you won't know what you don't stand for, and so you'll be tempted to try and do everything, because "no" won't be in your vocabulary. Trying to appeal to everyone by playing in the mushy middle not only will make you less appealing over the long haul (because being boring is not attractive), it also makes it very difficult to get started (because the enormity of the task makes everything too daunting to tackle), and makes it really tough to ship (because you have to do so much in order to meet the needs of so many people).
Having a point of view is incredibly liberating. It takes more energy and more time to get to an honest understanding of what you believe in, what you need to do, and what you won't do, but it is well and truly worth it.
For more on this subject, read Principle 19: Have a point of view