Usually I only use them when I personally know who I'm talking to. Because who knows how a random person will react to an emoji, misunderstanding their meaning, unintentionally or intentionally.
I also sometimes use them to indicate how casual my post is and should not be taken too seriously.
my take is, if you are alone in the kitchen and doing multiple cooking tasks. then you have one less thing to worry about.
it is also good because even children can operate the rice cooker. so you can assign that very easy task to a person with little to no experience and just a minimum of instructions.
So are they asking this because they won't change clothes, or what?