[cle]

It's not. It saves a few lines of code, with the tradeoff that you are handing some critical functionality--the wiring of dependencies--over to a black box. When things don't behave as you expect (which you might not initially notice), there is no code path to follow, you have to figure out what kind of magic is happening in the black box. It's just not worth the one-time cost of writing a few extra lines of code. This is also congruent with the aesthetic of Go in general.