Its not good hidding some members of the project its like they saying that the project will do unnecessary things thats why they need to hide of their upper members of the team.
Absolutely, it is hard to trust those projects that are hiding their team, because if they are really into a serious project and they want to gain more investors they would try that and securing that the money of their investors are in a good project not making them wonder if that project is really true and can help them to gain profit. When I am joining particular projects to support a few years ago, I am also considering that part aside from considering their whitepaper and website.