The main thing is, will the knife fit the purpose you need it to fill? I carry a knife every day. (Lately it's been a Ray Cover slipjoint.) I'musually in town, or an office, not out in the woods. I'm not cutting open some critter, although I could. I tend to pick a knife to fill the 99% of the use it will see, not some fantasy encounter that may or may not happen.
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It's not so much that I disagree.. your statement may be valid for you.. as that I don't share your outlook at all, and I confess I'm becoming weary of the "one-downsmanship" attitude toward knives that seems prevalent here, of all places.
Admittedly, most of us live in the urbs or the 'burbs. In the urbs or 'burbs you simply do not NEED a knife at all the course of normal, every-day life (outside of the kitchen), as evidenced by the majority of people simply not carrying one. There are other ways (and certainly more socially accepted ways) to trim that thread hanging off the sleeve button of your tweed jacket.
It follows that many of us, perhaps most of us, who do carry knives in the urbs and 'burbs are doing so not for expected needs, but for unexpected needs. The unexpected still happens all the time, and sometimes to us personally. Taking that into account (along with the facts that our teeth are inadequate fangs and our fingernails are not even remotely claws) does not imply fantasy, nor does desiring a capable, reliable tool as a substitute for our nonexistent fangs and claws seem unreasonable. The unexpected, by definition, does not pre-announce what will be required, and while a knife may be the most generalist tool that mankind has ever created, they are not all equally non-specialized. Some are far more generally useful than others.
Voluntarily carrying the least capable knife you can with the intent to meet only your most predictable needs seems just foolish to me. Adopting a superior, condescending attitude toward those who choose to be better equipped goes somewhat beyond that.