Start with your child first.
It is perfectly possible for a bright child who is not a natural scientist to get into medical school. However for them chemistry is likely to be harder, and biology will probably be an easier option than physics/maths. In contrast dyslexic DD is a natural scientist and so maths/physics were straightforward whilst biology exams (not the content) could be problematic.
Then think about the sort of training she may want. DDs course has a lot of placements. This suits her as she is quick to pick up the science she needs either from lectures or observation and she likes the patient contact. There seems to be a MN view that more formal academic courses are "better", but it is six years (DD will probably intercalate) and medicine offers a vast range of careers. Unless you are determined to go into academic medicine, I am not sure it will matter too much, and indeed more practical courses may provide better training for some specialisations and a good intercalation should open doors.
It is about fit.
I would also disagree with
" think op, your DD would need to focus on getting to med school and think about little else. It seems to require that approach these days!"
I am not sure which medschool Bubbles DD is at, but this does not seem true of DDs peers. Yes there are some who had to park everything in order to focus on the grades, and to some extent these are the ones who will then need to make more effort to stay on top of things like first year maths. But DD seems to have found her tribe of work-hard play-hard types who sign up for student places at weekend conferences, whilst enjoying a good sports/social life. She would have found A levels very dull if she were not doing plenty on the side, and the same is true now.
I think the same applies to volunteering/work experience. There is a lot of debate here on what medical schools expect. I think this needs to be flipped. Work experience is important in so far as it helps a student decide whether medicine is for them. If they found a shadowing experience fascinating - then great. If they happily engaged with residents at the local care home - also great. And as Medschoolrat suggests, if they can turn up to interview and talk spontaneously about the StJA experience - perfect. DD did lots, because she enjoyed it. She volunteered again this summer at a residential camp for the disabled and plans to do so again next. She saws that one or two of her peers are wavering about whether they are on the right course. She in contrast is forming her initial ideas on what to specialise in, based on WE and placements. (Paeds is ruled out after a season working for a family ski company!)
If a student has academic headroom, I would argue that breadth of experience, whether in music or volunteering, is valuable, and the ability to switch off by doing something very different is invaluable. And that whilst gaining the medschool place is a focus, there needs to be room to stand back and re appraise this every so often. It is too easy to get wrapped up in jumping the hurdles and see gaining a place as the target, without thinking about the end destination.