It's "easy" and apparently "safer" for a keeper to thump the ball 70 metres whenever it comes near him; or at least that's what many dogged traditionalists think.
Guardiola was making the point -- exaggeratedly so, as to support Bravo after a tumultuous debut -- that he adored the Chilean for not wilting and for sticking to the braver and more risk-filled strategy of trying to play like an 11th outfield player and to start moves from a position of keeper-sweeper.
The City manager's obsession with playing out from the back -- so as to give order to his team's forward movement and to lend a numerical advantage against opposition pressing -- knows no limits. He believes that the quicker the ball is lumped forward, the sooner it'll be returned more dangerously by the opposition.