I suspect that a big part why they rearrange at least once per year is precisely because they don't want people speed running their grocery shopping. When you know exactly what you want and where to get it, you stop looking at all the other products they offer.

I used to literally try to speedrun grocery shopping. I wanted to be in and out in the least time possible. I'm older and lazier now. Plus, now I listen to podcasts, so I'm somewhat distracted while I tend to the task. Maybe that's the biggest difference and the real reason I've settled down a bit.