These skill sets include phonological awareness, phonics (decoding), fluency, comprehension, and vocabulary. Mastering each of these subskills is necessary for students to become proficient readers.
I think a huge fallacy in this assertion is that there are several aspects that are dependent on a number of factors. It is too reductive and not realistic to expect a single teacher to grasp all of these. A solution would be to have a more holistic approach where all courses and teachers are trying to deliver these skill sets.