That's like asking an author if he writes using the alphabet or ascii.
Programming language debates are like asking Charles Dickens why he wrote in English rather than Russian. Would his books have been any different in Russian? No - it's irrelevant.
Language in literature is certainly not irrelevant.
Any translator (or even bilingual person) will tell you that some concepts are very hard to translate, because the target language was shaped by a different culture.
And in scientific and other non-fictions texts - which are closer to programs than literature - this was doubly so, as the number of important scientists and philosophers writing in non-native languages shows.
That's like asking an author if he writes using the alphabet or ascii.
Programming language debates are like asking Charles Dickens why he wrote in English rather than Russian. Would his books have been any different in Russian? No - it's irrelevant.