Bunting is usually harmful to scoring runs, and that's not something the Braves can really afford given the state of their offense.
This post was initially going to go up prior to the Braves relieving Fredi Gonzalez of managerial duties, and may have been more fitting prior to Brian Snitker's ascension as interim manager. Among other things, Fredi Gonzalez often took flak for relying on bunts, though in reality, he did not do so much: up until 2016, Braves' position players did not bunt* notably more than their counterparts on other teams. Only in 2016, with an embarrassingly bad cast of offensive characters, did Fredi Gonzalez begin to utilize the bunt with more frequency.