It can be a struggle to push forward when there are skeptics, naysayers, and expressive in-the-box thinkers. Sometimes it's by critical people who suffer from schadenfreude; often times it's by loved ones whose criticisms stem from concern. However, if "But it's been done before," is enough to deter you from pursuing a creative or entrepreneurial endeavor, you should just go back to your 9-5 job. It's been done before, but not by me.
I've been wrapped up with a full commitment to work lately. I've been stressed, excited, frustrated, happy all at the same time with the journey, and I love the process.