The solution to your first problem may not be easy, but it is obvious: those who want community holidays with different emphasis and/or more variety of holidays can create those holidays. The culture belongs to those who put in the work to create it, both in practice and in justice. This goes double if you’re correct that “we currently don’t have enough rationalist holidays and people are desperate for more” (which I have no independent opinion on).
The solution to your first problem may not be easy, but it is obvious: those who want community holidays with different emphasis and/or more variety of holidays can create those holidays. The culture belongs to those who put in the work to create it, both in practice and in justice. This goes double if you’re correct that “we currently don’t have enough rationalist holidays and people are desperate for more” (which I have no independent opinion on).