In the 1970’s, 7 people from my gliding club went on a parachute course for a weekend, which culminated in one real jump each (I believe with static lines to ensure that they did not forget to pull the D-ring).
One was injured (ankles, came back on crutches), one had a bad exit and started falling on his back so the ‘chute deployed under his armpit until he found out how to roll over, one went through a barn roof (I was told – but only bruising resulted), and two others had non-standard events, so only 2 out of 7 had normal uneventful jumps, IIRC.
Chris, with modern accelerated free-fall training techniques, with better methods of training, including tandem jumps that can coach a jumper from exit to landing, and with radios and better parachutes...these things need not be a concern any more.