Here's a phenomenon in the Talmudic methodology that I find difficult to comprehend:
A whole Masechet is dedicated to discussing Halachic aspects of certain Mitzvah but one/a couple of major Scriptual sources are totally neglected.
וְיַעֲקֹב נָסַע סֻכֹּתָה וַיִּבֶן לוֹ בָּיִת וּלְמִקְנֵהוּ עָשָׂה סֻכֹּת עַל־כֵּן קָרָא שֵׁם־הַמָּקוֹם סֻכּוֹת׃
But Jacob journeyed on to Succoth, and built a house for himself and made Succot for his cattle; that is why the place was called Succoth.
A lot can be learned from our forefather's behavior but the Sages don't connect it to the topic of Succah (the verse is discussed in other implications).
Why is such behavior?