Is uncertainty about the outcome of a project a good reason for not undertaking the project in the first place? If our forebears had thought like you, Europeans would never have discovered America, humans would never have flown, Everest would never have been conquered, man would never have stood on the moon. In comparison with the dangers and uncertainties involved in those projects, making voting compulsory pales into insignificance.

”We do these things not because they are easy, but because they are hard” - John F Kennedy.