“if it’s not plot relevant, cut it!!” is such awful writing advice
if JRR Tolkien had cut every bit of Lord of the Rings that wasn’t directly related to the central plot, it would have been just one book long, COLOURLESS and DULL AS DIRT.
all the little worldbuilding/character details are what draw you in and give the central plot weight, FOOL
I agree 100% I’m currently writing a book and I tend to focus on the little quirks of the characters because it helps the readers get to know them better
Its those little extra quirks of character plus details involving bits of interesting information that pulls a book together. The plot is the central theme, but you must develop creative and colorful storyline’s around the plot.