Wakandans being "normal humans" depends on how one defines normal humans. While they are not gods nor perfect (because Thor and company demonstrate the fallacy of gods being seen as perfect) and yes can fall prey to hubris, the fact remains that they have been inconsistently portrayed.
Don't confuse Wakanda's unconquered status with one of invincibility. If the Black Panther is a legacy then it absolutely not necessary for T'Chaka to die for Tchalla to become Black Panther. Killmonger did it. Shuri did it. Technically Tchalla did it with his uncle S'Yan.
The challenge lies in the narrative itself. The slaying of a parent isn't the impetus and motivation for becoming a Black Panther; being the best at protecting and leading Wakanda is.Again this is comic books. If a writer had a mind to there could be dozens, hundreds of universities, think tanks, scientific and technological institutions and organizations showcased through out Afraka. Might give the real world something to aspire to.
If Wakanda is so isolationist why would they risk contamination by sending their best and brightest to study abroad? Again another problem with the narrative.
Paternity results pending, Tchalla the Black Panther is indeed credited to the Lee and Kirby. Tchalla the Black Panther is indeed the legal proerty of Marvel. As far as being created in terms of original concept and acrediting Tchalla the Black Panther to whites... that may be analogous to crediting the creation and construction of the Meru (so called pyramids) to that land's most visible and current inhabitants.
The problem with Tchalla studying abroad lies in the writer. If the writer views Tchalla's university years immersed in studying and complaining about tests, skateboarding, getting high, rhyming, tagging, getting inked, playing sports and dating white girls then they're missing the point. With regards to Cornel West and Neil deGrasse Tyson, Tchalla should follow their example as they both studied and earned their respective intellectual acclaim in the land of their birth.
If the Wakandans were so "friggin" advanced yet allowed the continent to be ravaged by europeans and arabs, Francisco
Yet...
Wakandans are normal humans. They are not gods they're not perfect and they can be prey of hubris like many other great civilizations of the past. Wakanda was never supposed to be invincible neither is the Black Panther. It is all part of the narrative. Francisco
Four words...
Again it comes down to the writer (and of course the editors and parent company etc.) and how they choose to view an autonomous Afrakan people. The logical narrative for Wakanda of course would have been to secure all of continental and diasporac Afraka.