I know it's been said already, but I really don't think anyone in our generation or the next has to worry about job security in the retail field. Even if there were computers that read orders, checked for interactions, had a 100% success rate of catching errors, and dispensed prescriptions, do you really think the vast majority of people will be comfortable with such technology?
I worked at Kroger as a cashier (as in, regular cashier, not pharmacy cashier.) People can't even handle a U-SCAN (self-scanning registers.) Even for that, someone is needed to oversee the process, check for errors, etc. I can't tell you how many times I had to do overrides because the machine weighed something wrong, because a person hit something accidentally and the wrong weight came up (U-SCANs won't proceed unless the scanned item is placed on a scale and matches the database weight), etc. For example, a head of lettuce has the PLU 4061. It also has a barcode on it. For an item like that, the customer has to enter quantity. Often, they'll scan and not notice it, and try to type in the PLU -- oops, now they have 40 heads of lettuce on their order, and can't proceed because there isn't that much weight on the scale. However, if say, a small child or a heavy purse just happens to be placed on the scale when that happens, and the weight is close enough, the order will proceed. It's not as uncommon as anyone would imagine. That's just one stupid, yet common error. Can you imagine how devistating a self-serve pharmacy computer could turn out?
Also from working with the U-SCAN, I've learned that some people realllllly hate computers. I'm sure in say, 200 years from now, that'll change. But I've seen people get so frustrated with the machines that they've ripped off the pin-pads (where the credit cards go) and run out of the store. I've been cursed at, flipped off, etc just because I was the person overseeing the registers... and that'll be just because they can't get their meat to scan, or their peas rang up ten cents high because they didn't scan their store card yet. Can you imagine how angry someone could get if they felt they were being jipped or incorrectly processed somehow when their life could depend on the mistake? Who would they talk to about it? The computer? The grocery clerk? I highly doubt it! They'd probably have to call some sort of central help line, and I'm willing to bet a good portion of people would either forget or ignore their concern if it couldn't be taken care of on the spot.
IMO, retail pharmacy is an extremly stable job. The man you spoke with needs to have some confidence in his position!!!