Honestly it seems like I am the only one in my local Aldi who does this. I see people picking up fish that is three days older than the one at the back.
Seems kinda like farting in a crowded room and then slipping out the door.
I however choose not to do so quite deliberately. I want to avoid food waste. I just check the date is "good enough". My regular shop has a good enough flow that I usually pick from the front.
Food waste is a trending concern around here. But I think you and I who cares about shelf life belongs to the same minority. The majority has enough other worries and does not spend bandwidth to care as it is usually good enough.
I consider fish a "fresh" item and care more for looks and smell.
Same as with vegetables. But I hate people who prod everything - that is detrimental to the product.
* the amount of stock going through one fulfillment center instead of landing on shelves in smaller stores, means we never have old products laying around. The cucumber you get from us came in a few hours ago. The one in your store has been laying there for days and touched by many. 10 stores each need their own buffer to handle variable demand and thus overstock and get deliveries for certain products rarely. We don't. Our spoilage is so so low compared to traditional stores. * anyways, to alleviate the fears of ordering something that's about to expire, we guarantee x amount of days for perishable products.