That's what's supposed to be happening in CA right now. The 2nd shelter-in-place order stated that, even if you are an essential business, you were not allowed to operate non-essential components of your business.

I'd be pretty pissed off about roped-off aisles. When other people in the store aren't very vigilant about maintaining social distancing, having the additional aisles to escape into is a big deal.

They could still use aisles for transit, but if you're a hardware store with a garden area, you'd just need to close that one section. Though I'm sure you could make a case that someone gardening in their yard is essential, because it reduces their grocery store trips if they're growing food.