What about taking a fight into the electrical storm of a gas giant. Radar is down and visibility is poor. The enemy is somewhere close, but where? I know! I'll go into 3rd person, because if they start shooting at me, I can see where the fire is coming from by where my shields light up. Plus I'll have a better FOV... It's the sensible thing to do, and is precisely what I'd do unless 3rd person was horrendously nerfed. But I really dislike view-switching, so it certainly would affect my enjoyment of game. I'm sure there are other situations where switching to 3rd person would give an advantage.
If Frontier had said that they wanted to include 3rd person, I'd accept it and move on. Some decisions go against you, and that's one I'd live with. But the reason for repeatedly arguing against it is to counteract the people who repeatedly argue for it! It's just not representative if every argument is from people who don't like a decision, because it's somehow not okay to provide a counterview.
In single-player, I wouldn't mind there being third-person and cinematic camera angles available for all the bottom-watchers and cheats. I would probably use them myself for taking a few screenies here and there.