If you would stop complaining if the IDE shipped with the compiler, then just install them at the same time and consider it "shipped with". Splitting them is for convenience and choice, not because the designers are stupid. You can handle installing two things.

(And since we're on the subject of Java, let's not forget how they used to split up JRE and JDK downloads in a very similar way.)

Having the IDE ready to go takes care of the use case of changing one variable, but you didn't need the IDE in the first place. That one's fine either way.

For the use case of making a whole new program in nano, I acknowledge and reject it. You'll be fine. Use cases that exist only out of stubbornness don't need to be catered to. You have the IDE one click away.