I was just trying to light a fireplace as a beacon on the top of the hill of the Southeast island to attract other players but couldn't find a spot where it told me it's okay to light (though it was on the grass right in the open)
I kept moving the spot and tried to light it. Suddenly I realised I had only one match left.
I tried to reproduce this and it's no problem. The matches react as if you are trying to light a fireplace in the wind or rain.
If it is unsafe to light, then I shouldn't lose a match trying to light a fireplace.