I agree with what you say about wedding rings, most rituals are bound up with ancient superstitions.
You also mention Easter is not celebrated but in reality the essentials which the pagan Easter festival which was fed into the Christian Church is also incorporated into WT doctrine. It is so central to the ransom belief that all the things to do with the death of Jesus are found in paganism. The last supper was cribbed from Mithraism including the symbolic wine and biscuits. Even the fundamental pagan symbol of cleansing by human sacrifice is present. The timing of Easter at the first full moon after the spring equinox is perpetuated by JW doctrine. The death and resurrection of Jesus had counterparts in pagan worship as the son of the Sun God going to his heavenly father hence the brightness of the two of them ruling together in the heavens.
There are a lot more fascinating parallels which can be related directly to older folk tradition but the main point is that the Roman Church especially under Theodosius in the late fourth century banned all references to the pagan texts under harsh penalty and so began the illusion that the church and Bible had come by divine decree. The beliefs and rituals had in reality all come from paganism. Virtually all of Jesus' life, works and biography had been borrowed from pagan predecessors.