With a single command you will have authentication, billing, life-time licenses, leads generation, a beautiful landing page, and more. All in one place.
You can focus on the problem you are trying to solve, and forget about the generic stuff that doesn't add anything to your business.
Or better yet, do you have an idea? Create the landing page in less than an hour and start capturing emails from interested people, or better yet, selling licenses. There is no better way to validate your idea.