1: where would you put ur food if all your dishes are dirty?
2: the food leftover on a plate will start to smell and rotten up.
3: having a clean kitchen is a very good look on your actual hygiene.
4: when you get done cooking it'll leave a lot of mess everywhere and would you really want to keep that mess there so when next time you cook it'll be in the way? no.
5: there will be roaches and flies around your kitchen and house if you don't clean it regularly.