No, I get it. The thing is, people have solved these keys. Yes, they were smaller ranges and some of the pub keys are already known but as you said, assuming the creator isn't trolling, they will continue to be solved one way or another.
Of course they will get solved, it's just a matter whether the risk is worth it or not. If BTC price goes to the moon it's obviously worth it, as it was for 67, 68; 69 was too risky, and also kinda bad luck due to the 0.7% offset. But 71 isn't worth it today if one goes serious with it (instead of crazy).