Depending on jurisdiction, there might be cases where law enforcement can force you to use your biometric to unlock your phone but they can’t force you to reveal your pin. Reality vs what’s technically legal makes this comparison hard (ie consult with a local legal expert).
* It is easier to push your thumb on a screen than to pry a password out of your head. (relevant XKCD: https://xkcd.com/538/)
* You will leave fingerprints and other biometric features everywhere.