Chaosmancer
Legend
Fantastical loses its meaning when the audience has no frame of reference. If trees look like trees, feel like trees and explode into fireballs when chopped down, the audience wants an explanation and telling them "it's fantasy, you're not on Earth" isn't going to satisfy. At best, they check out and assume that they cannot understand the rules of the world and at worst they go full CinemaSins and nitpick every contradiction they find.
Sure, but how much explanation is needed?
"They evolved that way to scatter their seeds when lava beavers devour them." is a perfectly fine explanation for many people. Because getting into "wait, how exactly did this evolve" starts to become tedious for most people.
"Through training, hard-work, and the magical physics including the magical Ki energy flowing through every living body"... is a good enough explanation. Why are those things true? Because it is a fantasy world.