Its curious that in tv/film people's identity is censored by blur/pixelation/black bars on eyes and, documents are always censored by black bars. I dont recall

Its curious that in tv/film people's identity is censored by blur/pixelation/black bars on eyes and, documents are always censored by black bars. I dont recall seeing pixelation used for text, then why do we mostly go for pixelation in the first place when wanting to omit info on screen.