While toddlers are physically capable of doing many things, including carrying their own belongings, they are emotionally incapable of carrying anything. Not a damn thing.
You’ll be loaded up with a nappy bag, eight shopping bags, a pair of discarded toddler shoes, a drink bottle and a raggedy bunny rabbit and your toddler will find a special rock (i.e. a piece of gravel) and they’ll need you to carry it for them.
In many ways, they’re simply cleverer than we are. They’ve learnt that carrying things is arduous, and you seem able and willing, so why would they carry anything?
And when I say anything, I mean anything. They won’t carry their own snot if they happen to find a piece on the end of their finger. No, it doesn’t matter that they themselves removed it from their own nostril. If it is on their hand and they don’t want it there, you will need to take that snot from them. Yes, in the middle of the shopping centre, your child will hold out a finger with a huge booger on the end and you will take that booger off them.
Because this is who you are now. You carry your child’s snot. And refusal to carry the snot will result in a tantrum. Probably a violent one.