Welcome to StarCitizen and our community, pleasure to have you with us!
I know people use to use Voice attack without VR, here are some profiles!
Its for sure not a need, just personal preference and convenience. =]
Yeah, you're good! If you feel you have enough then don't worry about it! We do have a lot of key binds for this game but you'll be better off experiencing it then deciding if you think Voice attack or extra buttons are needed. =]
And if it helps, I remember people using Voice Attack for Shield distribution (front/rear/sides) and Flares/Chaff a lot. But that was awhile back, I'm sure there's great options for it though. Someone may have better answers for you but if there's anything else you need help with, don't hesitate to ask!
See you around!