(“. . . I have made countless errors . . .”)

An arrogant rider can be so lacking in awareness that they are blinded by their self image. Yes, it’s good to be confident and not ride tentatively, but introspection and self analysis are critical parts of good training. You don’t have to take my word for it.   Listen to the maestro:

“I have made countless errors in the training of literally thousands of horses.
Luckily I am aware of these faults, for otherwise I would never have made further progress. I know that I still have much to learn, and will go on learning until my dying day, not only by riding, but by studying, thinking deeply, and observing” – NUNO OLIVEIRA #nunooliveira

It’s a delicate balance. You must be willing to question what you’re doing, constantly re-evaluate, and be willing to adjust. This is normal and shouldn’t discourage you. It can be the source of great discoveries if you’re open to them.