Point one, fair enough, but I still am no aware of this sort of thing being used by anyone other than resue services themselves.
Point two
I don't travel much, only in my local and wild moorland area where mobile and radio signal of any sort is patchy, so it's excess weight and fairly useless.
Point three
I check weather before I go, and prepare accordingly, making sure I have the correct kit , and spare kit for weather change and emergencies.
Such as a whistle, strobe and warm clothing and rain cover, with a first aid kit, and orange bivvi and foil blanket.
I also like to think I carry enough skills (which weigh nothing) to survive relatively comfortably untill rescue.
Point four
People die in the hills and mountains because they take risks they shouldn't, or do not have proper gear. Not because they don't have a cb radio or whatever.
Even if you are able to use a phone for help, you could still die before rescue.
Where I live, which can be relatively wild within a short distance of my home, there are many black spots where radio communication is not possible, nor is there mobile phone signal.
We get a lot of walkers, and only on Sunday, I was "warned " by a visiting walker to be careful as there is no mobile signal here, which made me laugh as I've known that for 20+ years, and wondered why, less than a mile from civilisation they should worry about that.
Skills and relevant kit for the situations you might encounter, and not taking stupid risks, keep you safer than a radio or mobile phone.
I never rely on electronics, never have, and I'm old enough to be of a generation where I was able to roam miles as a child with nothing more than a napsack with a bottle of pop and some sarnies matches, and my girl guide knife..sometimes a map and compass, and learn skills that kept me safe which I still use today.
I realise the younger generations have not had that freedom and pleasure, but at least I know I can (and have) cope with adversity, and extradite safely.
It's important to learn how not rely on electronics.
Don't worry about the " what if" situations. Summer 2021 I broke my foot in a fall, but managed to get home on my own , and then call for help. Where I was, no communication was possible at all, so, the first aid, equipment and other skills I had saved the day.
No big deal. Anyone else would have sat down and tried to call for help, and been in a panic, unable to contact anyone.
I will admit, had it been my leg, I would have had a real problem, but I'd like to think I could have coped well enough to get somewhere where I could have got help. Roads were on my route within a shortish distance.
But then , I am a rather self reliant and stubborn person!