It not only makes sense, but there should likely be more antennas (although they may not be visible)
Let's take a quick look at what an antenna is. It serves one primary function: To best balance the impedance (think resistance if you're not an engineer) between the circuit producing/receiving the signal energy and free space.
(overly) Simplified explanation: If you are a photon of RF energy (yes, they are photons... and waves...) and are cruising around on a nice circuit board, zipping around at say 70% of the speed of light following nice gold or copper pathways, you're happy. There isn't much resistance. But suddenly someone gives you an energy drink x10000 (power amplifier) and throws you out in space at exactly the speed of light. You're going to hit lots of shock during this transition. The antenna is kind of like a smooth transition process for you so that you can acclimate to the change.
But back to the matter at hand, why would a space ship need so many?
The answer is quite simple. The ship needs to communicate. And being in space, there is no single direction relative to the body of the ship which it needs to communicate with. It is quite likely that the ship will need to communicate in many different directions at the same time, using different frequencies.
What this means is that any antenna built on a space ship will likely be used as part of an antenna array. Using fancy digital processing, the antenna 'beam' can be steered electrically while the antennas remain in fix orientation. While an overly-broad statement, the more antennas you have pointing in different directions, the more directions you can focus the RF energy towards without having to rotate an antenna. Also, the more antennas you have, the larger your overall gain is, which in distances of even light-minutes, could very well be important in space.
Also, some of the antennas could be used for directed energy weapons, which it stands to reason may require a massive increase in size due to the power densities involved. And ships need radars and other sensors, either passive or active, which will be looking in all directions around the ship, yet another reason to have more antennas.