Your question: "why I wasn't taught the graphical approach" was raised by many economists on this Twitter, and I have partially answered it in ucla.in/2mhxKdO and ucla.in/2L8OCyl. Without going too deep into Psychology, the answer is "Not home grown!". (cont.
Your second question: "Would I be [taught it] today" is tricky. @Susan_Athey says there is no need, because economists already have the answers. (see
According to others (eg @marcfbellemare, @PHuenermund @causalinf), economists are beginning to rebel
against the tyranny of outdatedness. This workshop: why19.causalai.net will
provide an opportunity for both rebels and conformists to present their cases before Clio, the Muse of history. #Bookofwhy.