Just like in medieval times there was an art movement to make the scenes appear like if they happened in a romanced version of their time, with castles, etc. Just like Christians today attempt to make those old mostly irrelevant texts "relevant" and "alive" today.
I'm a bit surprised if the JWs now also use Christian imagery from Catholicism that they consider to be "pagan". They didn't in my time. The JWs also don't embrace racist reframings, but a founder did adhere to racist nonsense like the "Cain bloodline". They're also against "Mary worship". In fact, it's one of the things that my father apparently missed from the JWs, a motherly figure, missing from the fundamentalist-patriarchal JWs. Before he converted, he considered her to be "more approachable" than other saints or the Trinity.
Besides the "all equal", Jesus was not caucasian anyway. An apology to reframe him as such would likely have appeared to be ridiculous and uncalled for to the living Jesus... This reminds me that there also are black Christ depictions, also motivated by supremacism and pseudohistory.