Until you look at the demo video and they put $12 worth of green onions in the shopping bag because chatgpt thought 6 green onions == 6 bunches of green onions
The guy did say "it could just checkout if you ask it too, but I prefer to review it first myself". Reviewing a list is much quicker than doing the whole shop provided it's 90% accurate. In the case you mention you click the minus button 5 times.