We don't.
Every new exchange has one ultimate goal in mind - make some money for the creators. Some try to do that legitimately, but unfortunately the vast majority resort to shady and unscrupulous activities and behavior to do so, be that faking their volumes, faking their trades, insider trading, pumping and dumping, exit scamming, selling your data, the list goes on. "Launching a new exchange" and IEOs seem to have partly replaced "launching a new token" and ICOs as the fastest and easiest way for scammers to lure in unsuspecting newbies.
For your own safety, you should be sticking to the large, reputable, and well known exchanges, although even then your safety isn't guaranteed.
We don't need a lot of global exchanges but can't say the same on local ones, there is a lack of them in some countries and more exchanges in such countries can help to fall fees.
In overall, yeah, a lot of exchangers are faking their data in order to get better positions on coinmarketcap and get attention of new users.
Not fastest or easiest way for scamming but it's really easiest way to collect users' data like some do, block you for no reason and ask KYC to unlock account.
Nowdays there is none exchanger which you can trust, not even binance too, none of them is reliable.
