The reason people use their phone lights as torches, is very very simple..... It's all they have!
What a powerbrick with led torch gives, is an option.
Being council property, the council use contractors to do repairs. It's amazing how many, turn up with no torch, n just use their PATHETIC phone light, and it is pathetic. Even the best "flash", isn't that good even compared to a £/$1 torch.
1 is a glowing led, the other is made to give n focus light and more powerful.
The compromise (I think the majority agree with) is the light of a decent torch (3w led) on a powerbrick, that still charges your phone (rechargeable torches are available for around £18 GBP (full kit)) , isn't heavy and fits easily in a pocket, is not a compromise.
There are varients out there, but the vast majority, are either really expensive pro-models, or not much better than a phone light.
Only once have I seen one with a torch head (see my photo above) but that was an attachment (which maybe an option, but obvs if separate could be lost).