A lot of depends for what perpose fraudsters use fake data. That is why it is necessary to check everything.
Unfortunately, we do not always have the opportunity to check everything. Moreover, fraudsters can hide information. Most scam projects are easy recognized. But there are very advanced scammers, they do not give you the opportunity to learn anything about them.
I agree that sometimes it is realy very hard to recognize the scam project. Fraudsters publish the information that investors want to see.