What's a more guaranteed way to get fired: report an issue with a task upfront or keep doing useless work for a couple of months until the boss finds out?
Now imagine being at McDonald’s on minimum wage. Your manager asks you to do something that in your eyes make no sense. Last time he did, you said something and got réprimantes for it. Do you bring it up again? Or you let the manager decide and move on with your life.
If was like "Get a mop, a bucket in the storeroom, pour in a cup of sugarsoap into the bucket and fill up with water then wash the floors". They washed the floors even though they couldn't find the sugarsoap because by accident they god sent sugar and soap instead, so they put that in, perfectly understanding what sugarsoap is and why sugar and soap won't replace it.