Sometimes even the decision isn't enough. At 7 my eldest very desperately wanted to be able to read. They all had Reading Eggs books that they were working through, middle child had pretty much "cracked the code" at 5, but eldest struggled. He cried every time we worked on English as no matter what or how much he tried, his brain simply refused to accept or understand certain blends.
Shortly after turning 8 he marathoned through the Artemis Fowl box set after not being able to read the bigger Dr Seuss books, apparently his brain decided it now just got the things it was refusing before.
Man people are messy.