Why aren't you a fan of options that have no effect on your gameplay? I can understand you not wanting 3rd person view because it can be argued that it confers an advantage... but why care about things that have no advantage? If more people can tweak the game to their own personal preference isn't that a good thing all round? I really don't understand that. :S
I can't speak for Pecisk, but my thoughts about this goes like this:
Having lots of options isn't automatically a good thing.
This issue has to to with how FD want you to experience the game. It is not something that really has that much to do with game-mechanics as such. It's a esthetic choice they have made.
Having the option to listen to a song you like but with other chords playing with the melody isn't impossible. But it wouldn't be what the musician intended for you to hear.
Having the option to see a James Cameron movie with a yellow tint instead of his trademark blue one isn't impossible, but it wouldn't be what he intended for you to see.
Taking an abstract painting and applying a color correction to it thus exchanging the colors isn't impossible, but it wouldn't be what the painter intended.
Taking a game like Mirror's Edge and removing the body (or making it 3rd person for that matter) isn't impossible, but it would change the experience that the devs wanted you to have.
The more options you have for whatever it is you are experiencing the more diluted the experience becomes. That doesn't mean ALL options should be removed of course, but options that touches on core elements of how they want the game experience to be should be clear and consistent IMO.
Since FD has on several occasions said that this game is meant to be experienced "from the eyes of the commander" this seems to be such a design choice. Therefore I feel they should stick to that as much as possible since that is going to make the game more focused and give it a clearer identity.