A catcher can carve out a good major league career for himself if defense is the first order of business. Forget what media and fans say, they have exhibited a huge lack of understanding and knowledge of the position any way, so let them pronounce whatever judgment they want. They don't know squat... literally.
That being said, Towles lack of good defense is disconcerting. At least Yadier Molina's 2006 campaign of suckitude with a bat was not a hinderance to the team that won a World Championship. Molina helped shut down the other team's running game, blocked the plate well and called an extremely good game (and even if he did not, Dave Duncan did!).
Houston needs to continue to push a good game calling catcher to the forefront, especially if attracting a Free Agent pitcher is an order of business. If they continue to seek offense from catcher and will sacrifice defense for it, it will not bode well for those pitchers who know what they want from a team.