Exactly. You can't expect to do any substantial gaming on a MacBook Pro. They aren't gaming computers. So, spending extra money to try to make it one isn't going to get you very far.I know that was for desktops and we're buying a laptop here, but while Apple builds a quality laptop, seeking high-end GPU performance from them is a fools game and everyone knows it.
On a separate note, I don't like the idea of "future proofing". Technology is changing rapidly. Anything you buy now will be inferior to next year's model. The question is: by how much? No matter what, in a number of years your Mac will be a piece of crap. It's just a question of how long you want to wait to replace it. Buy what's good for you now, not what you think will be good in the future.