Because it’s normalized dark window tint all around over the past few decades. We used to think family cars looked like this rather than the heavily tinted vehicles of today: https://i.insider.com/5e875eba8427e939fb61ffb4?width=1200&fo...

So now individuals get dark tint on windshields and front side windows, which would have really stood out 40 years ago but now is just another dark window in a sea of dark automotive glass. That’s my theory anyhow.