answer:
why do people add amplifiers to their sound system? so bypassers can enjoy the music as well? so they can hear everything rattle on the car?
why do people put different wheels on their car? the ones they have spin as well
why do people clean their engine bays?
Why do people add a LCR splitter?
basically you could name anything which does not
help performance whatsoever if you look at it like you're doing.