IMHO reading competency starts at home, not in the classroom. Kids need to be interested in reading, and that's up to the parents more than it is to the school.

My very unique / personal take. Have been doing sight words with my 5yo for the last two weeks. He just started his second term of prep (pre year 1). He's not advanced as far as I can't tell, but I'll tell you it's exhilarating to watch his progress. He absolutely loves the challenge of it. And he's already sounding out and reading short, repetitive books based on known words. He's a lucky kid for so many reasons. Not a great case in point for the same.

All kids are different, with unique needs, and schools should be expected to adapt to these. But it's a two way street. If an individual isn't reading by fourth grade, after four years of schooling, then something is going on .. either at home or in a cognitive sense. If a whole class isn't reading, then sure - look at the curriculum ... but there's probably something more systemic at play.