What? Not at all. they save a lot of time so I don't need to waist it on digging most of that time.
And like Chameleonred5 wrote:
What else are you planning on using that gunpowder for?
(Other than Dynamite)
Also, I'm not sure if this is (Or can be considered to be) for the 1.12 update. (this seams like it's a 1.11 update that was added a bit late.)
It's officially for the 1.11.1 Update