being self funded gives the project and owners, the needed autonomy and right to control and manage the establishment and venture without being restricted or censored.
It's better to be self funded than having institutionalized investors which might acts as centralized body over the projects.
Exactly, when your project is funded you are now under the influence of the funders, they would want you to consult them before implementing any new idea in the project.
You are under full censorship and would want to know how everything is run probably like protecting their interest and funds