It's mainly because people see 'FoV' + 'MMORPG' and think 'Oh it's about zoom!'
And when you tell them it isn't about zoom, their fragile minds cannot handle the concept that the camera in a third person video game has FoV and they start telling you that you're overreacting.
Overreacting over a medical issue. It's like telling someone having an epileptic fit to stop being a pussy.