I don't think so, I think this is actually disastrous for Republicans. You have a number of trends and statistics reducing their voter count and appeal in battleground states. Consolidating their base in safe red states hurts them even further here, and some of the people they drive away are going to settle in swing states instead.
This also isn't accurate. There are bright blue cores of red states like Austin in Texas. I doubt that the wealthier republicans are moving to a trailer park in Alabama.
It isn't smart from a strategic political position, but it's probably smart from a personal position. Hopefully eventually the National Popular Vote Interstate Compact goes into effect and we don't have to worry about crap like this.