I don't think should demonize all automation outright. Without some automation this hobby wouldn't be possible. Pumps, whether they're DC or AC, move water so we don't have to sit there with a wooden spoon and stir our tank. Heaters with built-in thermostats automatically turn on and off when the temperature goes outside of the desired range. Can you imagine watching your tank to see when it got too cold, plugging in a heater, then unplugging the heater when it got too hot again? Dosers (if you use them) remove the possibility that you'll forget to dose one day, or that you overdose.
I do agree with you in a way, though. We have a very accepting atmosphere to new technology and new automation in the hobby. This isn't necessarily a bad thing, but we should keep in mind that the state space of a system increases with complexity. The more complex a system gets, the more chances there are that one of those states is a failure state, one that we did not intend or foresee.