I can't agree with this... I never gave much creedence to the idea that things on a pool table happen because of "fortune", or lack thereof. Any shot you play has consequences that can, for the most part, be predicted. Sure, you can't accurately predict every minute aspect of every roll, but to say that an 8-ball sunk early is always due to bad luck is hogwash. If the eight is hanging, you either avoid it or you sink it. If it's in the line of the natural path of the cueball after a simple cut, you have to analyze what will happen to the eight. I don't see any reason to consider it bad luck, rather, it's usually just bad planning or lack of cueball control.
Well, there's an obvious difference between giving ball-in-hand and losing the game. There are times when giving ball-in-hand is not a big disadvantage at all (opponent has tough clusters, multiple problem balls). A loss is just that, gave over. BIH is nowhere near being a certain loss, especially for players below the pro level, or in situations where I'm way ahead of my opponent and have him well tied up. I definitely think changing this rule to be BIH makes 8-ball strategy a bit different. If my last OB is frozen on a dead combination with the eight, hanging deep in a corner pocket, I'm normally pretty screwed. With this proposed rule change, I can play the combination, perhaps sinking the eight and my last OB, and only give the opponent BIH, which may or may not lead to a lost game. If my opponent has a lot of problem balls, I still have a great chance of winning, especially if that was my last OB and I made it along with the eight in my example. That's only one scenario, I can think of many more that have drastically different consequences under these two early-eight rule scenarios.
Yes, you still would have to be careful around the eight...but I think it is obvious that, in some situations, you could afford to be FAR less careful. I think the difference is substantial.