'Musicality' (I like that) is the crux of the matter. When a new word is introduced into any language, it is adapted to that language's 'sound'.
In English, we have borrowed many words from other languages. And, without fail, we have altered those words to fit
our way of speaking.
Take the word 'cousin', for example. We pronounce it
/ˈkʌz
ən/, but the French, whence the word comes, pronounce it
/kuˈzɛ/ (it looks like we're stressing the wrong syllable, if I were to use your argument). Likewise, 'rodeo' comes to us from Spanish. When used to describe the cowboy event, the most common pronunciation is
/ˈroʊ
diˌoʊ/ (Are we stressing the wrong syllable?).
Add 'cursor' to the list of English and Spanish words that have radically different pronunciations. Musicality is the answer.