They are asking for universal access.
To use a daft analogy that Congresscritters might understand:
Apple have built a pretty secure safe. It's almost impossible to break open that safe without destroying the contents.
The FBI want Apple to make a special lockpick they can use to open one of these safes.
However, that lockpick must, by definition, also open all safes of that type and once built it is trivial to copy.
Furthermore, the FBI have acted dishonestly throughout.
They claimed that the lockpick and the legal force used to create it would only be used for this one case.
Both of these are simple lies. It appears they now accept the latter.
They also did not allow Apple to present arguments to the judge when they asked for the order against Apple.
Put simply, this is a huge overreach by law enforcement.