No, it is blizzard’s stubbornness.
I don’t see that it makes any difference to Blizzard either way, besides them now making far less money, since people from the UK will be a lot less likely to gift game time to their friends, and so their friends will not be enticed to come to play the game and pay for it themselves.
As i explained here… Changes to Purchasable Game Time Options for the British Pound (GBP) - Community / General Discussion - World of Warcraft Forums (blizzard.com)
I am sure you have something better to do with your time than keep replying here. Or are you a blizzard employee on an alt account being paid to come to post here?