Alan Turing Pardon: Why So Narrow?

https://twitter.com/Eastmad/status/332828506474037248
The Alan Turing Statutory Pardon Bill has been published on the Houses of Parliament website.
Turing was a mathematician and philosopher who cracked the Nazi Enigma code and invented electronic computing. He was also a homosexual, and was convicted of ‘Gross indecency between men’ in 1952. As a result he lost his security clearance, was subjected to chemical castration, and committed suicide when he was only 42.
This statutory pardon seeks to atone for the Government’s appalling treatment of a national hero.
Nevertheless, the idea of such a narrow pardon worries me a little. The implication seems to be that Turing gets a pardon because he achieved so much. But that should not be how the law and justice works. What about all those under-achievers and ordinary men who were convicted under the same iilliberal and unjust law? Why do they not get a pardon too?

Alan Turing
Alan Turing