> If you write equations in Word Equation Editor, your work just doesn't look very serious.
Haven't tried it in a while, but, last I checked, Word Equation Editor output didn't look serious because it looked janky and look like it wasn't really done in a "professional" tool. Part of that is a self-fulfilling prophecy of course, LaTeX output looks right in part because it's what people have been reading for decades, but TeX's formulas just look plain good.