From the New York Times:
The world’s finest climbers have long mused about the possibility of a ropeless “free solo” ascent of El Capitan in much the same spirit that science fiction buffs muse about faster-than-light-speed travel — as a daydream safely beyond human possibility.
Which structure does "safely" modify?
"ropeless “free solo” ascent of El Capitan" is considered as a daydream and beyond human possibility, but we do not say it is considered safely. How can I take the grammar of "safely" here?