There’s an art to putting things off.
Usually, when you are trying to avoid doing something you don’t want to do, you find other ways to fill your time. Hopefully other, better ways.
For example, my wife often says “I have a headache.” Not only can I neither confirm nor deny the presence of an ache in her head, making it the perfect excuse, she gets to go to sleep. And when you have a toddler, nothing is better than sleep.
When you are a toddler and you are trying to put off doing something you don’t want to do, you are in a pickle. Because not only do you have just about zero independence, thus limiting your ability to find alternative uses for your time, you’re also stupid.