I don't want to be presumptuous, but people that say this have rarely really ever built anything mostly pointless. But maybe you can prove me wrong and point me to your github.
Building pointless things is often about prototyping some idea, seeing if something can be done, or just messing around. It's never been about wrestling with OS APIs or grokking out-of-date docs. LLMs handle all this stupid boring stuff so you can do something cool that you think is cool.