To invest in your own future? Being successful leads to promotions in meritocracies, which can bring to to retirement faster, offer more interesting challenges, etc.
If you don't care, look for a union or government job where seniority reigns king and do the minimum every day for 45 years.
This type of answer leads to subsequent questions, f.e. - why would anyone want to retire faster? The final answer, I believe, is that the ultimate goal is "the feeling of relief that comes when the drive is satisfied. Relief, relaxation, and an end to the tension. Peace, happiness — no more yearning."
There are many ways to achieve that feeling without being successful in a job.
If you don't care, look for a union or government job where seniority reigns king and do the minimum every day for 45 years.