doctorbadwolf
Heretic of The Seventh Circle
I think you may still be missing something, though. It’s not just the scrawny kid playing the big strong guy....but enough about Emo Drizzt.
.......
I KID! There is a reason roleplaying is used in therapeutic settings as well as just "kill dem orcs"-style play.
One benefit is, as you posit, imagining yourself as the other. The weak kid who is the brawny fighter. The bullied teen who is the charismatic and popular bard.
....The normal and well-adjusted non-jerk who plays a Paladin.
That would be the flip (and beneficial) side of what Gygax is discussing; the desire to play "the other" as a means of domination; dominating the game (abilities) or the roleplaying (because of all your quirks and differences).
There is a fine line between self-expression and self-absorption, just as there is a fine line between clever and stupid.
It’s also the bullied ugly kid playing an “ugly” race and either getting to play in a world where people mostly don’t care how he looks, or where he can do something about the naughty words that do try to bully (or attack, or discriminate) him for his appearance.