Many people who doesn't reproduce delude themselves into thinking that what they do instead of having children is worthwhile and something valuable.
Of course almost without exception what people do thinking it's some great important thing is pointless or even outright harmful.
Albert Einstein wasted the last 30 years of his life on a fruitless effort trying to come up with a more unified theory (physics). There is also no shortage of crackpots thinking they are working on some revolutionary theory of physics when in reality they are just wasting their time with nonsense.
Of course almost without exception what people do thinking it's some great important thing is pointless or even outright harmful.
Albert Einstein wasted the last 30 years of his life on a fruitless effort trying to come up with a more unified theory (physics). There is also no shortage of crackpots thinking they are working on some revolutionary theory of physics when in reality they are just wasting their time with nonsense.