The article isn’t talking about someone quiting just any old job, but about the situation in which they believe they already have one of the best possible jobs in the industry.
In such a case, I imagine it’s easy to keep putting it off, precisely because you can’t think of a better scenario for yourself.
The person at at top-tier company who can't think of a better scenario AND has two years of savings seems to have no imagination or desire to enjoy life in any way...
In such a case, I imagine it’s easy to keep putting it off, precisely because you can’t think of a better scenario for yourself.