You could argue that you get predictable when you always autobet the flop, but on the other hand, often when you bet a ragged/moderately ragged flop, you bet for value with AK; and also, AK/AQ are not the only hands you autobet on the flop after raising preflop, so it's still not super-easy for your opponents.

So as a default play (to use while multitabling for example as you point out), I see nothing wrong with it.