Knives should scare , heck punches should scare too , If you loose that motivation your wasting the gift
if your training self defence you need to consider the blade .
if your considering the blade you better consider how to use one and how one can be used on you .
if your considering how to use one and how one can be used on you , then you should consider how to negate/avoid one .
if your considering how to negate/avoid one , you better consider how to counter attack/dominate one .
if your going straight to empty hand on knife as the simplest answer , your not being honest , knife on knife is that skillset bridge.
heck now your knife fighting , then you consider what happens when you loose yours/dont have one , how can you deploy , how can you retain , now how does empty hands match your weapons work . consider longer blades , consider sticks and bats , does it match .....
does it mean you should carry one and deploy one in self defence ? , is that not another decision with more personal legal and ethical questions ....
Do you have the realisation of tactics and mindset required in really dealing with self defence , or is it all still punch kick mutual engagement martial fantasy where fear never enters the picture ......
I think to many use the question of wether to carry and wether they could use to avoid the question of can I work with/against a bladed weapon, and hopefully that leads to can i really engage against real intent, can I muster an intent greater than theirs in time of need .
if you dont have the skillset its moot , if you dont have the mindset its moot.