For me the validity of the team is essentially necessary for the future of a project. Cause if we don't know who are behind the project, that can be difficult to build trust between people/investors and the company they put an investment.
Yes I agree with you apart from that we need put effort on our own like researching about the project. Also you can share the information on this forum about the project. If investors lose trust then definitely it will be considered only as a scam project.