Over 80% of the job could be done by properly designed algorithms - and 80% would be a conservative guess. The "interesting" cases are very rare, and mostly consist in easy-to-do diagnosis of unfrequent illnesses (I once diagnosed an insulinoma! hurrah!)
Just look at the growing number of tasks given to non-MD- say RN. It's a trend that will go on.
Human knowledge is nothing but the application of algorithms - deciding which symptoms are important, which are to be discarded, which require more investigation, etc.
Education is building algorithms. Experience is machine learning. Wisdom is statistics. Instinct is prioritization.
The faster we can implement all that in software, the better.