No one will invest in the project, if he finds something suspicious, these are facts, for example, even a team photo.
You are 100% right! It seems to me that if the team wants to remain incognito it is better to be honest to write that the team decided not to publicize their names and photos. But when they use other people's photos, it's like a Scam.
I think all these nuances should be understood by potential investors who have decided to work with this project! And just so dig, I think it is not necessary!