Some creatures lives are just weird. it makes life seem pointless dunnit?

yesterday i was watching planet earth (started at 22:00 on bbc4 if anyone else watched it) and theres this type of bug (cant remember what its called) but anyway, every 17 years, millions and millions of them come out from under the ground and fly around this forest. theyre kinda dumb and loads of them die and get eaten. if theyre lucky they mate, then after 36 hours they die, only for their babies to reappear another 17 years later! DOESNT THIS MAKE LIFE SEEM SO POINTLESS?!!! they just live for one and a half days then die. must suck to be one of those flies!