Tricky words aren't taught using sight reading, Rosemary - they are taught as decodable with a tricky bit.
ORT is a sight reading scheme - unless you are referring to the newer strands, rather than the core readers.
It's sight schemes which are dull, because they have to repeat, repeat, repeat to drill the same words in.
Here is Peter", "Peter is here", "Here is Jane", "Jane is here", "I like Peter", "I like Jane
Decodable books have much, much more scope - they don't have to repeat anything.
And later Peter and Jane books were NOT synthetic phonics from 8 onwards.
And they contained fucking golliwogs, ffs. How is that at all appropriate in this day and age? 