Well, it certainly wouldn't be the first time I am wrong, and won't be the last.
Look, the book is meant to be a guide and meant to be something that the masses can use as a starting point. I don't think it is fair to compare what Daniels says in a book to what Tinman says on his website or in a blog or on a message board - they are different fora that require different approaches.
That being said, I agree that if people just buy the book to follow the formulae and training plans, they are certainly undermining their training. But I kind of feel like saying that is akin to the person who buys hot coffee and then sues McDonald's when they spill the hot coffee on themselves and burn themselves. It is not that extreme, but the root idea is the same - if you are negligent in how you apply a useful item, the person who provided the useful item shares in the blame.
I also have been left with the feeling that Daniels has at times - particularly with respect to the third edition of his book - been more interested in selling books than in breaking new scientific ground.
But to say "A Daniels style approach isn't an appropriate way to train because (a) his book for the masses isn't fine tuned enough for specific users, (b) beginners are going to ignore the principles and just follow the training plans and (c) he is interested in making money from his book so he made it as general as possible" is throwing the baby out with the bath water. All of those things may be true, but the first two really aren't on Daniels, and the third is a natural outcome of writing a book. Heck, Daniels used to come on these boards and expound upon his principles with particularity, so he certainly gave some free advice along the way.
Daniels is not the be-all and end-all of training. Others have used a science based approach to alternative training approaches (Magness) or had great success without really delving with the detail of Daniels into the specific science of why they are doing what they are doing (Canova and Tinman). But if you read the book itself, and focus on the core principles, a canned Daniels approach is a great way to get started, and it can be refined over time to be applied to more advanced runners once you have the experience to understand what adjustments those runners need.
Is it better than a Canova style funnel approach or the CV approach of Tinman? I can't say, but I can say it is a scientifically sound approach that has worked for me, my college teammates from back in the 90s when Daniels was at the zenith of coaching, and for the people that I have coached since.