It is not about just knowing about an exchange but the validity of that exchange, many persons in this space has lost a lot of money to some exchange who carelessly refused to take the security of their exchange serious and ended up losing a lot of users money to hackers which we are not even sure if what has been done where truly carried out by hackers or the owners of the exchange themselves.
We need the owners of the exchange to give us a reason why we should put our money there for trading instead of using already existing platform.
100% I agree, new exchanges (any exchanges really) need to be approached with caution. As far as I can tell though there is nothing less valid about them as any other...? at some point you've gotta give new players a chance. The now leading exchanges were new once and even some of the most legitimate and respected exchanges like mt gox and poloniex have been compromised... Like I said though I am yet to be convinced and I think that will come with time, and also gauging other community members perspectives, which is why I posted about them here and am keen to hear others opinions. Maybe they will see red flags I don't, or maybe they think it's great...?!?