Because if you can get to those spots at lvl 35, say, then they probably aren't going to be too tough at lvl 51 where you'll be spending all your time.

And if you intend to power all the way up to lvl 51, then... well, yeah. But you'll be without ABS that whole time, so I guess you made a sacrifice to earn a reward.

But I have a feeling most people would check locations whenever they actually could do it, then cross their fingers that they found the wands early.

Not to mention, the previous ABS revamp was largely done to make the difficulty of locations roughly equal, so even if you did try to exploit this it wouldn't be for a significant gain.