The difference here, that parent was pointing at, is that you eat every single day. You might need to fix your toilet one day, or get a house a few times in your life, but eating is something that you can't get around.

Just like you shouldn't depend on someone to dress your, bathe you and wipe your ass for you (even though that's a whole profession too), depending on someone else to cook for you because you can't, puts you in a vulnerable spot.