> A more recent example is the Boeing 737-Max where there was a focus on automating trim control. In that case, the automation made the system more complex, to the detriment of a pilot understanding and reacting to an abnormal operation

To be fair this is not entirely accurate: a focus was made on stall prevention in a very specific mode of flight given the variant's increased susceptibility to the pitch-power couple. It did not make the system any more complex per se than other airliners - see e.g. Airbus aircraft which do actually have autotrim in normal flight. The actual kicker was that the existence of MCAS was hidden to avoid the need for lengthy re-training of pilots if the 737 MAX was deemed sufficiently different from its predecessor variants (on top of MCAS being rather poorly implemented in its first iteration).