I have little doubt that (height) matters: it puts off males who have even begun to challenge me if I stretch out my arms in even the most non-threatening manner. Seeing that someone can reach you a full foot before you can reach them may put off aggression.
I had two classmates who were significantly shorter. Their personalities contrasted: one was confrontational and aggressive, often got into fights and did not do nearly as well as the other who was quiet, studious and was the first boy I knew who had a hobby: I was astonished how much knowledge he had acquired from collecting postage stamps.
I was aware that these classmates were physically vulnerable but I could only help by being a friend. In general, the shorter men I have met tend to excel in professional life.
I still think the "hand in fire" metaphor is too far-fetched. The best I've seen is someone putting a hand over a candle for about 30 seconds. He was drunk (which may account for the time) yet withdrew his hand voluntarily before others could intervene.
Yes, being a tall extravert will discourage bullying. I was 4'8" when I started 7th grade, but 5'10" when I started 9th grade, so I saw the difference rather drastically. (FWIW I was personally physically bullied well more than the one time you witnessed, and I was nowhere near the most bullied kid in school).
From your experience, associating schooling with bullying is probably foreign. From my experience, I can't imagine anyone going through school without witnessing more than one act of physical bullying, because all forms of bullying were so omnipresent. Perhaps the term "Umwelt" applies here.
As physical bullying has become less socially accepted, the harms of non-physical bullying may have surpassed the harms of physical bullying today. I know many kids who were driven to self-harm from non-physical bullying. There was a teacher who would bully certain students causing them to drop out of the advanced math track (she was the only HS teacher teaching the 10th grade requirement for the track).
> >" putting your hand in it[fire] for 20 years"?
> Sorry, bad metaphor, too extreme. Nobody can do or imagine doing that.
I think, for some kids, it's not too much of an exaggeration, which is exactly why many kids drop out of school. I have heard stories of (and personally witnessed one) bullied kids jumping out of moving vehicles to avoid going to school.
I think for most kids, public schooling is "okay" for some it's great, but for many others, calling it institutionalized torture is not much of a stretch.