How to make Google Voice the default messaging app?

I just bought an LG G4 (on Sprint). Google Voice is not an option as the default messaging app (you must choose between Hangouts and the standard messaging app). I have tried a number of suggested tricks to make it work but it appears if I want to use Google Voice, I must also use Hangouts.

I just want to use Google Voice. Short of rooting my phone, is there any way to make Google Voice my default messaging app?