Well... it seems like the link I posted earlier said that someone had replaced their suunto stinger battery without any problems, and without any specialised equipment
Luck can always be a redeeming characteristic.
I can understand that your average jeweler doesn't want to potentailly be responsible for ruining a $1000+ piece of equipment for the $30 you're going to pay him for changing the battery, but that doesn't mean it can't be done
I don't know enough about how these things are set up to refute the claim. But I do know that Baron & Leeds (very high end watch dealer in Wailea -- read: Authorised Rolex Dealer) sends their customers to the jeweller I referred to for battery changes.