Generally I agree with this for 90% of startups. If it's a solved problem, you should not be doing it. Don't reinvent wheels just pick wheels off the street and use them. Then an axel then a frame, etc etc until you've got something that moves because it's literally held together by zipties.
The key is that a number of people are willing to pay you for the moving ziptie vehicle because it solves their particular problem - whatever it is.
Most recently I tried Cursor app. it helps me be a faster coder and uses something i already know - i really like it (except that they shit all over the hotkey bindings).