Ah well, most older walkers in Australia learnt to walk without poles, and continue to do so. There are several reasons:
The first is basic pride: I learnt to walk without a crutch: why should I change now?
The second is the Australia scrub: it makes a pole totally useless, or even an obstruction. If you had one you would have to fold it up and put it away. So why bother getting it out?
Now, there may be special circumstances which benefit from a pole. Walking across a snow field is one; walking down a river bed which is riddled with quicksand is another. Crossing a difficult river may benefit from having a stick, but we leave it on the far bank. More often, Sue and I lock arms together and cross together.
I’ll grant you that old wobbly or injured knees on a steep downhill can benefit from a stick. I understand that.
And of course a third reason is that many Oz walkers are stingey: poles are expensive and I don’t really need one, so why spend all that money? I’ll find a stick if I really need one. Which is not often.
I still remember wondering what that strange clicking noise was one time in France when we were pitching the tent out of sight near a road. It turned out to be a group of Sunday walkers going up the gentle ASPHALT road waving their poles around vigorously. They looked like right idiots.
Bottom line: HYOH, carry poles if you want to. But do NOT tell novices that they must have trekking poles to be walkers, because that just ain’t so.
Cheers
PS: I used to carry a 70 lb pack in my Uni days. That included 50 m of rope for the cliffs. Oh well.