There are plenty more like that one too. Perhaps the most graphic and relevant to the title of this thread:
Arriving back at a rural location after a flight in a small Robinson helicopter, the pilot had shut the aircraft down and exited the aircraft while the rotors ran down. According to reports, his four-year-old daughter approached him and was fatally injured when he lifted her onto his shoulders – and into the still moving main-rotor disc….
Whether you do or don't is up to ones own risk tolerance but its clear that moving under the disk in motion is not without peril. Its a bit like crossing the road. With care it can be accomplished reliably and safely but get it wrong and you can end up very dead.