The medical world moves at a glacial pace compared to tech. Complaining that ML algos haven't swept the industry ignores all of the factors pushing it in that direction.
"Best medicine" operates on a consensus model of the most prudent decision-making given present knowledge and evidence. That takes time. Pushing boundaries as a doctor outside of a research environment doesn't earn you brownie points. It increases your chances of getting sued.
You also dramatically overestimate the amount of autonomy any given doctor has over the tools they are able to use. The vast majority are employees. It is like if you worked at Google as a SWE, and I came on HN ranting that you don't want to use the most recent release of Sonnet 3.5 to help you write features faster for Gmail, because you're "fiercely protective of your salary." You would laugh at how ignorant the complaint sounds.