At most medical schools they teach you the biology as if you have never studied it before. There is a lot of chemistry that you are just expected to know. They certainly don’t stop to teach you the first principles of chemistry behind it. When we were doing enzyme reactions this first year, for instance, there was a lot of stuff about equilibriums in that where I thought, Christ I’m glad I did chemistry and not biology.
I’m not saying that’s a reason to do chemistry, I’m saying that’s why they ideally want you to have it and why it’s useful.
Yes, you can get away without it. But I t will narrow the pool of universities you can apply to. A bad UCAT could potentially strip you down even further. Ideally, you want as wide pool of places open to you as possible.
Your plan to drop chemistry basically carries about the same risk as if you did it.
There are a lot of resources out there that can help you get better at chemistry and there are benefits to having done it which you’ll see once you get there.
Up to you in the end.