A Cessna has very different aerodynamic issues than a jetliner. Multi-engine also has its own issues (such as if one engine dies, the airplane tries to turn around it).

Setting a Cessna down on the runway is fairly strait forward. A jetliner, on the other hand, is quite complex to land.

I don't know if you can claim one is more straightforward. Sure a Cessna flies slower and has relatively simple aerodynamics. However, you could also be operating it out of a 400m sloping grass strip with a mountain off one end.

An A320 might be flying 3 times faster but is generally flying between relatively flat, straight runaways several miles long with approaches typically flown on a stable instrument approach from several nautical miles away. It's control laws mean flying straight or maintaining a particular bank is as simple as letting go of the control stick. If anything the stick and rudder skills in normal circumstances are much less involved. Systems management, obviously the autopilot, but also environmental, hydraulic, navigation an the operational concerns are obviously vastly more complex.

I see where you're going here but no

A Cessna an a big jet fly by the exact same principles and they stop flying due to the exact same principles as well

Sure the procedures and parameters and automations are different (as well as things like wing positioning, engine positioning, swept wings, number of engines, sure)

But you raise the nose of both of them enough they will both stall. If you lose speed they will both stall. They will behave similarly (or maybe weirdly) enough in curves.

And I think this is what was forgotten here. Having a fancy cockpit does not make it less than a dual-engine swept-wing fixed-wing aircraft. The principles are the same