What's wrong or illegal about those adjustable aluminum canes, which is what I use?
I need a cane. There are many criteria by which to judge a cane. Necessity trumps all of them.
I have a stock cane and a knob cane. They're sturdier than my default cane. They look nicer than my default cane. If I use them for too long they put more pain on me than they are likely to put on anybody that I might hit. I have enough difficulties without tossing a bunch of additional pain on top of them.
I default to using a cheap $19 adjustable cane from Walmart. It has a derby handle with gel. I get pain from it. Not as much. Not as soon. Otherwise, I would never use this cane.