I would pay for a personal shopper who is working for me, towards my interests, and not in the interests of any particular store.
We can't trust store employees to give us the best products because not all grocery items are created equal. An apple is not just an apple. There are good apples and bad apples. I don't trust someone whose incentive is to sell all the apples to give me a good apple when they can give me a bad apple that won't otherwise sell.
I also don't like that a store employee only works for one store. I would rather pay a personal shopper to go to grocery store #1 and then grocery store #2 if necessary to get the brands I prefer. Having someone in grocery store #1 tell me "Brand X is out of stock, so we substituted brand Z" is not preferable.
We can't trust store employees to give us the best products because not all grocery items are created equal. An apple is not just an apple. There are good apples and bad apples. I don't trust someone whose incentive is to sell all the apples to give me a good apple when they can give me a bad apple that won't otherwise sell.
I also don't like that a store employee only works for one store. I would rather pay a personal shopper to go to grocery store #1 and then grocery store #2 if necessary to get the brands I prefer. Having someone in grocery store #1 tell me "Brand X is out of stock, so we substituted brand Z" is not preferable.