Believe it or not, you'd be surprised how many times in a day you could use a knife for various reasons. Until you carry one and are used to it being there, you won't really get it.
Not to mention that little problem called earth and crime, where it could actuality save yourself. But let's not get extreme here, it's rare when a person attacks another person, of course. We have laws against that.
A nice highly luminous flashlight is extremely important and is absolutely under appreciated. Not necessarily for EDC in your pocket (there are some small enough) but to keep around your person at all times, in your vehicle, night stand etc. Most people use their phone, and it doesn't come close to being adequate enough (especially in an emergency situation).