I’m not sure I agree with the anti-hook sentiment. IMHO, more than a hook or not, it puts you in a different category of consideration (international students) which has its own sets of challenges: less options for financial aid, school reputation, English-proficiency, geographic distribution.
Being from Peru is not particularly special; you will be competing with students from the rest of Latin America (as well as Peru). Some schools do drill down and seek out candidates from areas/countries that might be underrepresented, while other schools seem to focus on countries that have sent students their way previously.