1. Why high heels? 2. Heights in movie vs. real life.

Why does Ivana wear very high heels around León when she's so much taller than he is and while trying to come to grips with his tiny stature?

Did anyone notice that in the movie, Ivana (Julieta Diaz) is very tall and León (Guillermo Francella) is only 4' 6" (1.37 m), while in real life, she's above average 5' 6" (1.68 m) and he's taller at 5' 8" (1.72 m)? Cinematographers in earlier movies such as the Lord of the Rings trilogy had already developed techniques for altering heights. I wonder how they do this.