The problem with that thinking, that standing wholly with God is somehow ‘impractical’, is that it can make one adopt evil means. For example, if one accepts the Church teaching on the torture of prisoners in the context of ‘just war’ doctrine, one could easily find themselves trying to choose between ‘pro choice’ and ‘unjust war’, both of which are gravely immoral.
Further, there is little to suggest that pragmatism really works either. Our largest drop in the abortion rate in the US since Roe was under the watch of a pro-choice President and our states which have abortion rates significantly below the national average are disproportionately represented by pro-choice state legislatures. Instead of ‘wasting’ our votes pursuing our values, it appears that we have simply attached them to a litmus test of lip service.
Case in point, look at the '08 Presidential race. We have one party were candidates now claim to be pro-life with regards to abortion (though also aggressively supporting things like state sponsored torture), but the top spots in both parties are all currently occupied by individuals with long histories of being pro-abortion in public life. Even several second tier candidates, who at least seem to have the right voting record, have a surprising amount of abortion baggage in their closets.
If one stands with God, and encourages others to do so, how could one’s vote truly be wasted? Since the beginning of the Church and Roman persecution, Christians have long stood for what is right, not what is popular or what is convenient. On the other hand, if we are ‘practical’ to the point where our votes are traded for empty lip service, how do we face the Son of Man when it is our time?
Also, the Church has provided some doctrinal notes on questions like voting:
vatican.va/roman_curia/congregations/cfaith/documents/rc_con_cfaith_doc_20021124_politica_en.html