Where did you get that from? Passive voice is extremely common in conversations.
"He was acquitted of robbery" (passive) is probably more common than "The jury acquitted him of robbery" (active). "I was born in 1973" (passive) is much more common than "My mother gave birth to me in 1973" (active). "The X-Files was cancelled in 2002" (passive) vs. "Fox management cancelled the X-Files in 2002" (active). Even very colloquial phrases like, "The Cubs got wrecked in that series." Etc.
[Edit to expand/clarify examples.]