What you said, Esav. Use of the knife for self defense is a poor end game. Use of a knife you don't normally use for EDC cutting means you'll probably wind up grabbing the one you train with - the one you're most familiar with - the one you can rely on - the one you trust yourself not to drop, fumble, or cut yourself with.
Using your SD knife as your only knife guarantees a much higher success rate in drawing and opening. Most of us don't carry two or three knives precisely because of that. I don't rely on speed openers because they cannot guarantee absolute rock solid 100% they will open - and reliability is paramount.
The use of a knife for self defense isn't supported statistically or tactically in real life. Unless you're confronted with a true life or death decision, pulling a knife makes you the assailant in court, and if it really is life and death, a knife is a poor choice in absolute stopping power - the ability to immediately stop the attack.
Which is why the legal concealed carry of firearms is almost universal now, and why assaults are gravitating toward those who are considered unarmed.
This isn't meant as a flame - it's meant to inform and correct the misperceptions of generations of TV fed and inexperienced knife users to prevent them making a fatal mistake. If your local situation is so horrible, you are much better off learning martial arts and applying for concealed carry until you move or beat down the local hoods. You will be able to recognize, respond, and resolutely deal with the situation in a much safer manner knowing your real limitations, and recognize who is ego tripping and who is the mature adult.
It will result in more mature marketing of knives for their true use, and help deanimate arguments to restrict sales, possession, carry, and use. Look the the negative results we have with switchblade and balisong possession, or any knife in Great Britain.
When your up to your hips in alligators, it's too late to drain the swamp.