Why doesn't white day light produce distinct lines in the spectrum?

Why doesn't white day light produce distinct lines in the spectrum?

Sunlight is a type of thermal continuum radiation, it's Blackbody radiation... you can now impress family and friends by telling them that the Sun is black.

http://www.astro.yale.edu/vdbosch/astro320_summary27.pdf

It's spectrum is also full of lines - these are absorption lines from the light ionising atoms in it's atmosphere. fwiw this is how Helium was discovered - named Helios after the sun which was initially the only place it could be detected.