I would second what’s been said above. However, I would encourage you to really reflect on that experience. It sounds like you actually identified something very important about medicine: it can be dastardly dull and mundane, especially to watch! Not that I encourage you to put it in those exact terms but I think you’ve got enough from that to realise that a medic doesn’t just learn from watching other people, and that you’ve perhaps learned a lot about yourself as a learner: that you learn by doing, hence all the other things that you’ve done as a proactive learner, as a volunteer, doing your EPQ.
It all depends on the narrative you tell. If you think what you’ve done is boring, it will come across as such. You’ve been busy, not idle. But if you write it as you did there – or even not that you’ve actively avoided other work experiences but that you’ve not taken advantage of other work experience opportunities that others have done – you may come across poorly.
That said, very few universities actively select based on the personal statement. I think, though, that the interview question you need to watch out for is: what have you done to prepare yourself for a career in medicine? You don’t want to come across as someone who hasn’t done more than the bare minimum. There are applicants who will have literally devoured every opportunity going who will have reflected well on their experiences and will perform well in a question like that. Make sure you have something to say for that. I nearly tripped up on a question like this because I hadn’t so much prepared as I had tried to build on my experience in healthcare. I had to really think about what that question was asking me and come up with a response in about 8 seconds! You’ve done a lot that is relevant to a career in medicine but something about your post suggests that you were being a good student rather than necessarily actively preparing yourself for medicine and seeking out as many opportunities as you could.
You sound like you’ve got the core components but you need to take care when it comes to the assembly. Maybe there’s a couple of components missing. I would suggest maybe picking up the BSMS course and thinking: what can I get from this? Maybe think about doing some volunteering where you’re providing care or support to someone and thinking about what is it about providing hands on care that I would be taking over to medicine? What can I learn about myself from that?
The one thing you perhaps lack is a sense of responsibility to other people. Maybe you’ve just not included it but I would say that there are things that come from doing work which has a direct impact on people’s lives, minds and bodies that you cannot learn from anywhere else. It was on these interview questions that I was able to make my answers sing and yes they do ask you about times when you’ve been responsible for others. So maybe try and fill that gap.