The point of noise reduction is kind of a big deal in many situations (it's not that hard to find an area with enough noise to make you lose all your wireless bonuses).
That combined with the whole "Trodes can get knocked off" deal, another question can be asked: why have trodes instead of a datajack? After all, it's only 0.1 essence and 2k nuyen, that's practically nothing for many characters.
Of course, for many characters, 0.1 essence is a big deal, and 2k is still 2k. So there are plenty of people that opt for trodes, while many other people default to a datajack. Seems about balanced to me.