In any case it's not actually phone-free, just a publicity stunt.
Or is it about the disturbance caused by other people using their phones? ...or maybe to have a plausible story to tell the people who tried to reach you? ("Sorry you couldn't reach me at the weekend, boss, I was at this island in Finland where ...").
I think this is a lovely initiative and I think it would be great if it could cause a bit of a trend.
As an Australian it's hilarious to talk to tourists and hear they're going to get a bus from Melbourne to the 12 Apostles and back, which is an 8 hour round trip, but aren't planning to spend time at the rest of the spectacularly beautiful coastline or national parks in between. The most popular tourist destinations all seem to be like that: you go there to cross them off the list even though comparably beautiful and much less popular attractions are nearby, for the sake of going somewhere recognisable.
There's nothing wrong with going to a few well known spots in a holiday, but if you just go straight from tourist trap to tourist trap you'll miss all the most enjoyable things.
Honestly, I wish we had more paternalism as a lot of the problems we have in the West is because we refuse to apply objective moral standards to people which has resulted in many self-destructive tendencies in many individuals with governments collectively shrugging to themselves everywhere because that is what the people want. Good for Finland for having a spine and pointing out the obvious that smartphones are terrible for people especially when they are trying to relax in nature.
Caltopo has helped me not get lost on long loops where turning around isn’t an option.
Over here in the Far East, everyone has a phone with them, whether they're in the city or up in the mountains enjoying nature. If you get attacked by a bear or have some other emergency, not having a phone means you'll probably die, so not carrying one is a good way to get a Darwin Award.
So weird when people try to blame things on "the West".
Bears are common in the mountains. No, nothing needs to "be done" about those bears. Wear bear bells and be cautious.
(Drake) "Oh, I'm... sorry."
(your mom, nodding emphatically) "I came here to give you a piece of my mind. I paid $740 to get me and my children in here so I can say this to your face."
(Drake, nodding) "Madam, please... it is your right."
(your mom) "Well I didn't like it! I don't like any of your music!"
(Drake, nodding again) "Ma'am, I'm not sure I like it either. I'm just selling records here."
Do they also use their device to block stairs or crosswalks? If their first reaction to this was "but I need it", then maybe.
You know what I love? Identifying plants, looking things up and reading ebooks. I don’t take many pictures, but I appreciate having them as a way to situate an experience in time. I am fine with this way of using technology in nature.
Let me enjoy nature how I damn please. My experience is valid too. You do you, I do me.