You are confusing "Having been around for a while" with "Having practical experience". Uncle Bob has been a consultant for a very, very long time and living off articles, presentations and books on the topic of software engineering. He has much more practice talking and consulting about these things than actually writing code in the industry.
Not that I think that ad hominem attacks are a good way to settle this particular debate, but most of what you are complaining about can be directly applied to DHH as well. That's the nature of ad hominems. They don't really get to the heart of the problem.
