Because the effort you are talking about is completely unnecessary. Imagine every grocery store would require you do a little dance when you buy a carton of milk. Your vision needs some narrowing (which I believe will justify the parent point), because as-is it has obvious counterexamples.
I believe your problem is that "effort" is unspecified. "some effort" would make the statement correct, but some effort does not justify arbitrary effort, therefore you have no point here.
Grocery stores do in fact make you walk through a maze to get to the items you want and absolutely would block any technology that would let you get only what you had in mind without seeing what else is on offer.
I believe your problem is that "effort" is unspecified. "some effort" would make the statement correct, but some effort does not justify arbitrary effort, therefore you have no point here.