It's not a poor career choice if he wouldn't be happy, doesn't think he could settle at the Club, doesn't feel he would get a regular start and so on.  I doubt the lad is pratted and cheesy as it is (and it is) you can't buy happiness.  He clearly likes it up here and I think Rangers would suit him much better......wouldn't like to see it though. 
  
I would imagine the wages at Blackpool (parachute payments from EPL for the next couple of years) would be better than what Craig Whyte/Rangers have on the table. 
  
Must be down to football, family, and chance to win things rather than financial. 
  
Again, if he goes to Rangers.