Solving a problem : Why vs How

Sometimes when we get stuck in a problem we can take two approaches. 

Try to find out "why" that problem has happened, go to the root cause of the problem and address that root cause. Sometimes this takes a lot of time and you might get stuck digging deep into the root cause. 

There's another approach that I read somewhere is about the "How". You don't have to know the root cause of the problem. As there are different solutions for a given problem, one can ask : How can I solve this problem differently? Is there any other way of overcoming this. 

I find this useful in some situations when I get stuck on the approach of Why. This gives a fresh perspective and results in progress. Sometimes you don't need to address the root cause. 

 An example: The problem of procrastinating. Why do I procrastinate vs How can I stop procrastinating.