This can symbolize in general that a Jew is a “somebody”, not a nobody sheep, like Mitzri women who are dependent on a midwife to give birth and in general she is a sheep! A Jew is an active, wild, and crazy creature like lions and snakes (Chazal say that we are the: עַ זִ ים שֶּ בָ אוּמות boldest of all the nations), but all those powerful Kochos are used in the service of Hashem Whom we follow like a sheep. But our basic Ma'ala is a powerful creature.
We just channel our Kochos properly, like Dovid who was an: אַדְמונִי ש"א טז יב flaming red head, and he killed the Pelishtim with his power. A human being is a standing upright creature, who bends to Ratzon Hashem, but basically he’s tough עַ זִ ים שֶּ בָ אוּמות) boldest of all the nations). But if you aren’t standing altogether, then you’re missing in basic humanity, like a Mitzri and Canaani who are hopelessly involved in Arayos, like animals who are horizontal creatures.
Notice how the Tur starts off with: הֱוֵּי עַז כַנָמֵּר וְגִבור כָאֲרִ י Be bold as a leopard, strong as a lion, etc. And when we left Mitzrayim, we were called: צִבְאות ה' the army of Hashem; i.e., strong soldiers who fight their Yetzer Hara! When you work on holding from yourself, and making believe you are a big Tzaddik, on never being Mya'esh, and seeing yourself as a strong, energetic, efficient person even though inside you feel the opposite; then you are fighting the two lowlife nations Mitzrayim and Canaan, and Hashem has nachas from your make-believe Ga'ava.
Having “Shtoltz” was a major Avoda in Novardok, and meeting the world and going against the popular mode gave them their extreme self-confidence
