yes ... I agree, everything that exists serves a purpose - but the concept of Duality wants to label them "good or bad" even though Science has finally revealed that all things made Manifest (on Earth) are the result of pairs of pos and neg energy "dancing" in the frequency of their creator's intent ... that ALL things are equally as "good" as they are "bad" (pos and neg charged particles) - which is simply a determination made by an individual experiencing them

for example, some may believe that a rolly coaster ride is fun and exciting - exhilarating - while others might believe it is dangerous, foolish and life threatening ... the "value" they each give the same exact experience is based in Duality - one or the other - and you will be hard pressed to make them admit that it is BOTH ...

the world is not dark OR Light - it is both, and when light passes through the shard of consciousness (soul) within the darkness of our bodies - it is split into a vast array of colors ... that contain both dark and light shades and to reject one of these because you BELIEVE it is "bad" will distort the BIG PICTURE of Life and leave it lacking its full vibrational brilliance.