I was a very good, very confident skier black runs, moguls, off-piste, all conditions yada yada. I hadn't fallen for years.
However, my even better, unbelievably good brother, skied flat out into me on an empty blue run when he turned towards me as I was stopping. Totally freakish accident, neither one of us had ever skied into some else before, or since, or had any other kind of accident. Unfortunately he's a 6'3, muscle machine. I'm slightly faster at turning than he is, and if it had been the other way around I might just have got around him. C'est la vie.
Skis popped off pretty much instantly. I somersaulted several times down hill and landed so hard I couldn't breathe for several seconds, couldn't think for more, and couldn't move for several minutes. One foot jammed into the snow as I was still fallling. I dislocated my hip, badly tore three ligaments in my knee and displaced my foot and tore a tendon in my heel, all down one side. I was bruised all down both sides of my body (where my brother hit me and where I bounced). Plus strained ligaments in the other leg and very sore muscles all over.
I used to be extremely sporty. Not any more. I'm too injured. It was over 5 years ago and I've only recently worked my way back up to challenging skiing, and I can't do it long. I can maybe do moguls a few times in a week of skiing or my knees are knackered etc etc.
So when we went skiing I was 8 weeks pregnant I wouldn't go on the slopes for love nor money. And even not skiing the altitude really wiped me out. We're not going this Christmas either as I'm pregnant again.
So just a warning that you don't have to be the one to fall, it doesn't have to be a snowboarder, and it doesn't have to be a beginner. It might very well be your ski partner.
Also, having dodgy ligaments now means I can really feel the effect of pregnancy on them, so even aside from anything else I would be worried about the damage the strain of skiing would do to them.