You can be pretty sure that it is. You should definitely do competitor research, but also don't reject ideas just because someone's already doing something similar. Execution is much more important, and the details do matter.
Totally agree with you. Ideas are cheap. I don't know the exact statistics but I found that most of the times, a person's startup idea will be already done by someone else. You need to do research for your idea nonetheless. But just don't get dishearten so quickly when you see that someone has already executed similar ideas.
