I don't think it's a perspective, I think it's one of the fundamental building blocks in the whole pattern of Personal Development. It's not a high level building block though, it's a low level tool, one which people below that line can use to get higher. People who can't push through unease to go after what they want are going to waste away, below their potential. It's not a case of inspiration or laziness, it's just doing the right steps that it takes to succeed.
But: It can only take you so far. If you struggle with procrastination, then it will help you achieve some goals, but it won't solve the problem of having goals that don't align with your true self. It won't solve the problem of the struggle and suffereing caused when you do things you don't like doing. Once you build up the discipline with courage to the point where you are willing to do what it takes, you can take those training wheels off and go for the next jump into Personal Development:
Aligning your goals with your true passion and transmuting your actions into something enjoyable.
If what you are going after is really what you want, then there is no more struggle. You love doing the work because of where it takes you. There's no need to "do something you don't like doing" because everything you do, you love doing, it's aligned with a higher purpose. On top of that, everything that doesn't align with the higher purpose(like doing the washing
), is fully accepted because it's needed to live in order to continue working towards the higher purpose. You can transmute crappy activities into neutral or positive activities because they enable you to live your best and they become the foundation for living a wonderful life.
Yes, discipline to do what it takes is a great start, but it doesn't take you all the way. I also wouldn't say it's the core of personal development either, but it's definately somewhere to begin.