>the hydrodynamic effects of these large ships in relatively shallow and narrow canals is underappreciated
I'm really surprised I haven't seen this mentioned. A long time ago, I was trained as a merchant ship's navigation officer. One of the things we were taught (but unfortunately had few opportunities to practice), was using "bank cushion" or "bank suction" to use the hydraulic interaction between the hull and a narrow body of water like a river to navigate tight curves. These days, there are simulations that I'm sure capture these effects to it's easier to get some experience with them.
Of course, in the case of the Ever Given it seems that the grounding was mainly due to not compensating for the strong cross winds.