I would often do general consulting while mainly helping with tech, marketing or sales... and I noticed that all of my most important advice no one would follow. It got so extreme that I would often joke that "I know my advice is good because no one ever takes it". David Maister acknowledged a similar thing in his book "Strategy and the Fat Smoker: Doing What's Obvious But Not Easy"
This article strikes a chord of course because its right in line with that thought. Deathbed regrets in that sense are kind of cheap - they knew what they were doing and did it anyway. I think the author is however missing a key feature of this genre though - those regrets are almost always things that are there, that have no deadline and are easily delayed. Spending time with family, working on hobbies or creative pursuits, and so on. What the regretters are failing to attribute is their lack of discipline... and that there is a valuable take away. The genre could really be just a derivative of: "I wish I had been more disciplined in my life"