But it goes against the mantra that all smart shopping will be awarded.
Back when that mantra was stated, the only five games were Any Number, Bonus Game, Grocery Game, Double Prices, and the Bullseye where you had seven guesses to get the price of the car. Yes, these five games did encourage smart shopping, but repeating those same five games would be boring. So, each game has to be memorable for something. Every new game should have its own memorable motif, and the games that currently don't are either retired (like Step Up) or refurbished (like Bullseye II).
To be memorable, some games introduced needed to have an element of luck. The first game that it was possible to play "perfectly" but lose was actually introduced two years later, with Card Game. With the original rules, it was possible to have really rotten luck, and pull a $200 range card, get an ace early on but could only use it for up to $1,000, and draw a face card that threw you over the edge. If the show truly was only based on smart shopping, this would have been fixed right away.
After its debut in 1974, it took nearly a decade for the aces to be an instant "say the price and stop", and until 2005 when finally, the lowest range card was $1,000.
Also, you stated that "all smart shopping will be awarded". That wasn't what was said in the mantra on the first episode.
that is your favorite game still based on the pricing of merchandise, with wonderful awards for smart shoppers.
This doesn't mean that smart shopper are guaranteed an instant win, but are guaranteed a chance at wonderful awards, which could simply mean winning the IUFB. In fact, "smart shopping" is actually awarded on the show with a IUFB worth more than $500 and another $500 in cash.
Does this mean not everyone wins their pricing game? Yes, it does. But that doesn't mean smart shoppers get no edge at all.