Even if you don’t want to carry or own a firearm learning to use and care for one is just one more bit of information that may one day save you life or even more important save the life of those you love.

"I once took a CCW course, but only because I wanted to carry a knife bigger than the legal limit here."

Carrying a knife for defense is as much or more of a responsibility as carrying a firearm. As an ex-LEO and self-defense instructor I have taught courses on knife defense and survived knife attacks. Like a firearm if you draw it you better be willing to use it. One of the things that is the hardest to get people to understand and believe (it took 75 stitches to make me a believer) is that within 20’ a knife is more deadly than a gun unless you have it pointed and ready to shoot.
Most people get their view of a knife fights from movies where no one gets hurt much till the end. But you have to remember if your close enough to cut or stab some one they are close enough to do the same to you and if you get in a fight with a knife you will suffer injuries.
A couple of other considerations is the amount of blood involved in a knife encounter is enough to send most people into shock, especially when they realize some or most of it is theirs. Also while the number of knife encounters is much lower than firearms encounters they have a higher percentage that result in death.