Can these people maneuver in a dark room? No because they are not bats. There is a difference from having some special skills vs. actually possessing capability that can paint the surrounding with sound. Bats can do that and dolphins can but human can’t
many blind people see with sounds it is a common place fact illustrating the human abilities like animals...
Try that:
https://www.youtube.com/watch?v=AofvXF6UQvc This case of Ethan and daniel is pure echolocation in human
https://www.youtube.com/watch?v=S9lCbFOJ18Q There is more in human perception that there is in a voltmeter....
That does not means that cable direction exist.... That means we cannot trust a frequencies meter to know it exist or not .... Saying the opposite is faith in a witch called technology.... Technology is NOT science by any means....