It’s easier than ever to carry one.
(Or did you just factiously mean that people have smart phones on them which can function as torches?)
Here, if you go the the pub at night as the streetlights are turned off at midnight, so you take a torch (your phone as a backup). Its perfectly commonplace. To suggest this is "anti-pedestrian" is a bit silly. Rather, it's anti-light pollution.
Yes, generally the purpose of the light is so others can see you.
My god, we spend all of our lives blasting lights into our eyes (some people call these lights "screens"), we've forgotten how to live without it!
I'm in an urban area, but it's not as well-lit as a downtown environment. There's street lights every 2-3 houses and they're not super bright.
I personally prefer this over a downtown-like bright environment since it makes it easier to sleep and the ambience is just better at night.
You state this like it is a bad idea.
If you have a cell phone, you have a torch.
If you are walking in a place where there are cars, having a light on you is a great way to reduce your risk of being hit. So yes, you should absolutely be carrying a torch if you are walking near streets after dark. Nordic countries teach this in kindergarden.
When I'm crossing a street after dark, I always flash my torch at potentially oncoming cars. Even if I'm at a lit crosswalk.
If you are walking in a place without cars, then the place probably doesn't have the infra to provide street lighting. You may want a torch, depends on the phase of the moon and your comfort level with dim lighting.
This comment chain started with someone suggesting that in cities lighting be turned off almost everywhere, and someone replied that pedestrians won't be able to clearly see where they're going without a torch (and I agreed). Where I live, no pedestrian in a city would ever need to use a torch to see where they're going.
You've posted a couple of replies saying that pedestrians should carry a torch so that cars can see them. Well, maybe, maybe not. But that's a different matter.