Being a student was the hardest time of your life and not because you had to pull all nighters to get your essays finished (which you knew about for months), but because you had to grow up and live by yourself. You never realised how much effort it took to actually unload the dishwasher and washing machine, but the very worst of it was trying to open tins and cans. You were training to be a doctor and tin openers completely baffled you. To this day, the majority of you will probably opt for tins and cans that you can pull open instead of having to figure out how to use a tin opener. And even then, the lid will probably snap in half so you can't get fully in without the help of a knife which you will cut your finger on, and then again on the lid.
