It depends whether you're building something for the utility of it or to make money.
You can do the latter in a crowded market as you said, but often if you think you would like to build something for yourself, which is often the best way to build a product, then it's certainly possible to be satisfied with something that already exists.
You can do the latter in a crowded market as you said, but often if you think you would like to build something for yourself, which is often the best way to build a product, then it's certainly possible to be satisfied with something that already exists.