That is simple statistics, but often missed. I agree 100%.I think that a lot of the 1970s players would not take a 70% shot and would instead play safe. When you have been playing a lot of 99%+ shots, a shot you might miss one in three looks pretty scary. However, if you instead go into a safety battle with no lock-up safety to start with, you are probably around 50% to get the first runnable position. That is a mistake. You should take the 70% path rather than the 50% path.
It's like punting on 4th down.