Conservation of fuel. Especially as the fuel for "classic" two stage rocket would be vastly cheaper than magic-fuel they used later in the movie. Why everybody

Conservation of fuel. Especially as the fuel for "classic" two stage rocket would be vastly cheaper than magic-fuel they used later in the movie. Why everybody brings up this honestly stupidest ctiticism about the movie is beyond me. It's like you lack both imagination and understanding how space missions work.