Maybe everyone does it at some level, but not everyone works in a job that has the potential to wreck other people's lives and freedoms. There should be a higher standard for doctors, prosecutors, cops, judges etc than someone writing a todo CRUD app or a cashier at a bodega.
It is not too much to ask for prosecutors to be a bit more careful, bit more factual, understand the powers that come with their position and use it wisely. If they are not able to do that, they should pick some other profession which has lesser potential to cause damage than law enforcement.
Also - now that the software has proven defective, are they doing to go after Fujitsu or those who tested/signed off on the software? Probably not, maybe they will find a scapegoat at best.