How is this supposed to work? Most projects are going to require a specific demographic to show up and vote. For example if I am creating a tool to help dentist

How is this supposed to work? Most projects are going to require a specific demographic to show up and vote. For example if I am creating a tool to help dentists keep better records of their patients, how will you find dentists to vote on my project? I won't care what most other people think. If someone is creating an application or tool that could be used by anyone, and thus, could be reviewed by anyone, they would be better served by putting a survey on a site with good distribution like facebook or HN. I'm not sure what this app solves. I can already type up my app ideas and put them on the internet if I want. That's not the problem. The problem is getting a pulse from the right people. I'm dealing with that problem right now. I have a rough idea of what I should build but I'm hunting down the right people one by one because there isn't many better ways to do it and the general public's opinion of it would be worthless.