Religions are allowed to perform legal marriage and funeral ceremonies. Philosophies are not. Philosophies do not enjoy these benefits. These tax benefits will increase the income available to achieve the three aims above. It would be impossible to achieve the three objectives above if we did not organize.
Local groups can only come into existence where there are sufficient pantheists in one place.
But if we rely on the slow process of people discovering the Scientific Pantheism web site, this will simply not form local groups in the majority of smaller towns, and individual pantheists will continue to find themselves religiously isolated. No system of facilitators for weddings or funerals that would satisfy civil authorities could be set up without some form of organization and minimal licensing. For most people dogma is a term of abuse. Dogma implies unchanging inflexibility, which is invariably based on a claim of divine authority of some sort. Not all religions are dogmatic.