Sadly a big understatement.
All should review the pilot's log book in the docket. It highlights IMO a callous disregard for maintaining and logging instrument currency requirements. I counted 10 log book pages for the last 10 years, 1 per year, rarely logging individual flights but almost entirely just summary entries. Only logging actual instrument time in summary entries involving many hours without naming approaches, departures, holding etc. Notes may indicate IFR work, such as ILS's RNAV's but never logged actual approaches by name nor logged a single practice instrument approach under the hood in the 10 years I saw; except logging simulated instrument during a flight review by instructor. No IPC endorsements in the back either. Can only imagine what an Inspector would conclude when the pilot was last "legal" to file an IFR flight plan.
I seriously doubt the medical status had anything to do with his accident, the reports finding was Spatial Disorientation.
Why do smart people keep reminding us that IMC flying, especially low IMC, should only be flown by instrument "proficient" pilots?
His wife said, that he had no appointments, meetings, or compelling reason to return home on the day of the accident.
At the time of departure they cited a 300 ceiling with 4 mi vis.