Musk developed a mini-submarine designed to carry the 12 boys to safety.
However, in an interview with CNN, Unsworth described Musk’s contraption as useless and as nothing more than a grab for attention.
He also said the billionaire was asked to leave the cave.
“It just had absolutely no chance of working. He had no conception of what the cave passage was like. The submarine I believe was approximately 5ft 6in long, rigid, so it wouldn’t fill gone round corners or round any obstacles,” Unsworth said.
“It wouldn’t fill made the first 50 metres into the cave from the dive start point. It was just a PR stunt.”
Unsworth was on an international team of specialist cave divers. They were successful in bringing the boys to safety, using stretchers and a system of pulleys.
Musk did so in response to a tweet which contained excerpts from an op-ed published in the original York Times by Zeynep Tufekci titled, “What Elon Musk Should Learn From the Thailand Cave Rescue.”