1. no concept of reading, context is not helpful
2. start to read, use context to cover any weaknesses and gaps
3. become fluent reader, no longer need context to cover weaknesses and gaps.
As an experienced educator, I would say there is no process of learning (anything) that doesn't follow this path, whether using context is formally taught or not.
It's an important part of teaching to understand where weaknesses are being papered over and support fixing that. It may be that one teaching method or another makes certain weaknesses easier to identify or fix, but in the end, enough dedicated practice is going to sort out these weaknesses either way.
The article presents this as though context is bad - but you need context to bridge from the start to the end of the process.
The article repeatedly says "poor reader" when it is really talking about a stage of learning to read (the anecdotes describe people stuck on this stage).
In my opinion: This is a really dangerous way of representing the problem of educating people, which denies agency to learners.