>>713293329Because it's fun. It's an artistic choice. And it prevents your main characters saying something cringe like "well excuuuuse me, princess!" Your heroes will never be criticized for having a bad line of dialogue.
Now in my personal opinion, Voicefags are just as bad as Lyricfags when discussing music. What's wrong with your brain, that you can't enjoy a nice musical number without lyrics. Do you always need to be told what to feel with words?
Or with games, can you not understand what's happening without the characters speaking words?