I'm far from an expert on this, but I would guess the safety of being outdoors heavily depends on additional factors, like for example wind direction and speed.
A very fit athletic person who has done endurance training can do 30 miles in a day, but that's not typical. Most people could do around 10+ if their life literally depended on it like in the aftermath of a nuke
That wouldn't be better for the company. They probably don't make money on selling the hardware.