“because they are a distraction and I know what is going on/being sung anyway”
Like, how many times does one have to hear Violetta’s lamentations to get the picture? lol
Or, Rigoletto’s regrets.
Or the fury of Wotan.
And then there's Prince Calaf's aria, NESSUM DORMA, in Turandot, and I couldn't care less, if I tried, about the words! The same is true for The Queen of the Night's opening aria and almost all of the rest of THE MAGIC FLUTE.