“if your situation requires you to send your toddler shopping for you then you have too many kids to handle.”
And that is exactly the point. Hashem gives us kids so we will take care of them. If a person is not willing to either 1. wait til the next day to get something from the store or 2. ask an older kid or neighbor to pick something up from the store, then they are clearly not willing to take on the responsibility of caring for a small child. If my 5-y-o daughter has a playdate (I live in Israel), I have to drop her off, pick her up, and I have to tell the mother of the house “I do not permit my daughter to go playing outside without adult supervision.” I’m still shocked I have to say this at all! Israel is not safe, the US is not safe, nowhere is safe enough for a small kid to go around on their own. Either the people who are being reckless with their children’s lives are living in denial, or they are simply lazy. There’s also chinuch issues. If these little kids are outside playing without adult supervision, how are they going to learn good middos? It’s a situation of “the blind leading the blind.”