Don’t you dare compare surgeons and programmers

Given the following quotes, isn't the answer to the question somewhat obvious?

it took 6.5 years on average

My own Ph.D. dissertation is backed up by close to 100K lines of code

A short time spent on a fairly small code base of which you are the sole author, not an encouraging state of affairs with regards to what happens in the real world. It is not uncommon for a production system to have been under active development for decades or more by dozens of people. So 200 man years of effort vs 6.5 man years on average. 100K lines of code that has never seen production, maintenance, or turn over.

A CS PhD has never performed in an environment approaching anything like a professional setting as part of their education. A MD has and has done so for a large portion of their education. There really is no comparison between a MD education and a CS PhD when it comes to time spent in a professional setting.