or do all decentralized projects need to be anonymous?
Being anonymous or not become your own choice. You will be determining whether you must become anon or not but again people are always seeing a project with anonymous project as a scam project. If your project will be marked as a scam project and then you must not be surprised to see that. It's caused by people are seeing your project as an anon project.
yes i agree with you. decentralized projects do not have to be anonymous. because the first thing everyone sees is the team, being anonymous it will only lower people's trust. After all, if the project is good, why should you be afraid to appear in public. there are many pure decentralization projects, whose team published. just look at ethereum with Vitalik, or charlie liee with his Litecoin. being anonymous is sometimes unwelcome and not good for project development.