Yeah, KCL is super picky, if your PS leans too hard into medicine, they’ll likely bin it. Some unis are more relaxed (like Teesside, UCLan, maybe Portsmouth), but the more competitive ones (KCL, QMUL, Bristol) expect a PS focused on DHT.
If you’re doing DHT as a backup, make sure at least one version of your PS clearly shows why you’re genuinely into it. Even a few strong lines about hygiene/therapy can help if you're doing the new UCAS format.