I agree that it's a really cool project but I personally would not use it as a primary safety mechanism.
I've got a ham radio license and I see the same mistake with people who think a 5W VHF handheld or 10W HF radio will help them in dire straights. HF isn't reliable enough and all it takes is a little terrain to block VHF. You're also not guaranteed that there's even anyone on the other side of the radio if you really need help.
I would recommend a SPOT or inReach as a your primary safety device with this as a (neat) backup. All they need is a line of sight to the sky which is much easier to do than either LoRA, VHF or HF.
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If you want a good idea of the limits of LoRA Ars did a pretty good write-up a few years ago: https://arstechnica.com/gadgets/2019/10/lostik-usb-lora-radi... . You'll see that even in a few mile radius there's plenty of places where even a high-end LoRA device drops out because very few radios can go directly through terrain(if you're curious https://en.wikipedia.org/wiki/Through-the-earth_mine_communi... covers some aspects).
It is a really cool modulation for low power but it's still subject to the physics of radio propagation.