How many other reliable voting blocs does the GOP have aside from Evangelicals? I suspect the GOP alienates more voters away from the party than it gains by trying to appeal to SoCons.
Look at post 127, the GOP doesn’t do much in the way of trying to appeal to full conservatives, they give a little lip service, do some gun stuff, wave the flag a little, but then they do like post 127.
There is no pool of voters out there in the democrat party that are eager to become republicans for conservative economic theory and Ayn Rand, but they can be appealed to on the eternal issues of family friendly, culture friendly, society friendly, social issues.