Does your two-year-old also turn on your stove burners? That seems a lot more dangerous. Put them out-of-reach. Worst case: they press the buttons anyway and you have to open an app and cancel the orders.

Two years old are perfectly able to turn on stove burners!

It's not the knob that stops them, it's being disciplined by parents.

I can easily go behind my two-year-old and switch the burners off. I can't as easily return 42 jugs of Tide and get refunds.

You can cancel the 42 jugs of Tide before it gets even shipped as you get a notification when someone presses the button.

You can easily press "cancel order" when the push notification comes through to your phone.

You mean the single jug that was queued upon pressing the button 42 times.