I have been in a few fist fights and lost more than I won, but earned the respect to not be bothered, and even in losing I did not pull a knife.
Nor have I. Not sure what your point is here, unless you're assuming I'm going around with a knife threatening poor unarmed defenseless muggers, or bullying neighbors intent on gentlemanly fisticuffs.
The only time in my life I can remember being the first to display a weapon, it was to a gentleman who was dragging a beaten, screaming woman across a common area by her hair. It seems that most pat rules have exceptions.
If I get into a bad situation, I don't want them to know I have a knife until it is too late for them to do anything about it
Which is apparently gospel these days, and is what I've been told again and again.
It's not that I haven't heard it, it's that I don't agree.
If we're discussing what scenarios are likely, it's very unlikely that I'm going to be crawling through the jungle with a knife in my teeth intent on sentry removal, which seems to be the main implied value of a dark blade. If that scenario looks likely in the future, I'll run out and buy one.
I agree that you're probably better off with the assailants not knowing what you have, IF violence is inevitable. But that's a big "if".
Very often, these people are bullying cowards looking for easy targets they can victimize at no risk to themselves. Depending on circumstances, it may be possible to dissuade them from initiating an attack. I find that solution preferable. As I said, twice I was able to do this, whereas if I had pretended to be unarmed, in effect I would have been choosing to let the attack happen, and probably would have ended up having to stab someone.
I'm grateful that didn't happen for a number of reasons, and I will continue to prefer a bright blade (or at least one that doesn't completely disappear in the dark), whatever the pundits are pontificating about it.