To be fair, lack of birth control or hygene were not religious practices. Human sacrifice was. Iy seems to me shallow/flippant to dismiss the issue as one that is on a par with the issues you mentioned. Are you aware of the religious significance of human sacrifice within Celtic religion and believe that it is no longer relevant, or are you unaware and uninterested, aware but not willing, etc.?
I'm aware, not willing, and don't think it matters anymore in society. My point was that just because something happened in the past doesn't mean it should be replicated. Granted, it never occurred to me that human sacrifice could be performed in effigy - not something I'd ever make part of my practice, but to each their own.