Colored manga

so a few minutes ago I was talking with my friend and he told me he wanted to read a manga (note: He has never read a manga before) I was quite surprised but he seemed really into it so since he liked The promised neverland, I told him to read the manga. A few minutes latter he texts me saying “why manga isn’t full color? it looks much better that way” I gasp hysterically like a normal person will do. He then tells me he can’t quite understand the drawings when is black and white, which I assume he’s referring to details(?

I just wanted to know if anyone thinks like this