Estupidez translates to "stupidity" or "foolishness". It's a strong, direct word that isn't commonly found in romantic song lyrics, making it stand out.
In the context of "Para Qué", the singer uses it in the line "Y aunque hoy no quede nada, no fue una estupidez" (And even if today there's nothing left, it wasn't foolishness). This powerful declaration at the end of the song reclaims the value of a lost love, asserting that despite the pain and the ending, the relationship itself was meaningful and not a mistake. It's a poignant and memorable way to conclude the narrative.
Andrés Cepeda builds the whole song out of one question asked over and over: ¿Para qué? — what for? He opens it on something small and physical — «¿Para qué darte un beso que dura un segundo?» ("Why give you a kiss that lasts a second?") — and keeps widening it until the question covers everything the couple still does out of habit. «¿Para qué estrellas con la ventana cerrada?» ("Why stars with the window closed?") turns it outward: the thing is still there, and nothing about them can reach it anymore.
The chorus names the shape of the ending rather than the feeling. «Porque nuestra cometa ya no nos pide cuerda» ("Because our kite doesn't ask for string anymore") — the kite has stopped pulling, so there is nothing left to let out. Then the line that lands hardest in Latin America: «Ser Argentina sin Charly, sin Maradona» ("Be Argentina without Charly, without Maradona") — Charly García and Diego Maradona, a country with its two biggest figures removed and still going through the motions. By the last verse he is at the door with the suitcase already shut, asking for one more kiss precisely because there is no after: «Recordemos lo nuestro aunque no haya un después» ("Let's remember our story even if there's no after").