I'd agree partially. I've read only the first book, realized it was incredibly good, and since then I'm waiting for the series to be completed, to read the whole thing together. That makes sense to me: why read a portion of the story and then wait years for each new part? You won't remember all the details and will have to read all the previous books every time there's a new one, or miss part of the experience.
However, if GRRM were to die without finishing the story (or less tragically, if he announced that he was abandoning it to write exclusively about football and the TV series) I would still advice you to read the incomplete story. Even if there's no ending, you can still enjoy this outstanding ride.
Or, who knows, maybe they'll hire Sanderson to finish it.

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