Technical riding off's are mostly not serious. Read: We usually do it slow and it is mostly just a fall-over. Not talking about our more serious Enduro-type riders here.

Not always. One can just fall wrong and hurt oneself seriously. Shark broke his collar bone with a gentle fall.
I have been lucky during higher speed riding and city traffic. No off's,
Technical? Numerous.
I had my first two off's on my second outing out on the bike when I got it. OK. It was the muddy canals but there after I had less "fear" to go ride technical terrain.
As you said. All part of the learning curve.