The airbus FBW is not like the boeing CWS autopilot mode, nor it uses a pitch demand control law.
Hand flying a 737 is more demanding than flying a 320, but you still require the same basic abilities, knowledge and technique.
No matter how much software an airplane has, its performance depends on its attitude and its thrust. From that poing of view, airbus is the same as any airplane. It is the autotrim function which makes it very different than a boeing and making it easier to fly it. But you still have to set a pitch and a thrust to get the desired performance. That is the basic skill that needs to practiced regularly.