I do not aggree to this. Several players are modest including Vishy. Have you watched the movie searching for bobby fischer? It is based on real story of Joshua Waitzkin.
Why chessplayers are arrogants and have an enormous ego?

Maybe they objectify everything, and can't tell the difference between the pieces and people. They treat both the same.

Why chessplayers are arrogants and have an enormous ego?
Why do you ASSume that all chessplayers are like this? How many chessplayers have you met in your life?
To paraphrase Capt Renault I'm shocked, shocked to find out that you feel this way!

@FakeMaster,
A sweeping statement,indeed!! Could you kindly justify, or provide proof beyond reasonable doubt that it is true. For example, out of a thousand chess players across the globe that you had interacted over the board; how many through your experience, are deemed to be arrogant and egoistic ??

Why do people who tend to make sweeping generalizations also tend to blunder so much at chess? I think you can find both ego maniacs and extremely humble chess masters. The ones with the eccentric personalities get more media attention and public recognition for their antics, that's all.
Why chessplayers are arrogants and have an enormous ego?
Generally I don't accept any stereotypical statement. To explain why some chessplayers are arrogant with enormous egos, I would respond: "They're human. Arrogance and ego are not uncommon to the species."

The chessplayers I've met in real life tend to be nice and humble.
The chessplayers I've met online, on the other hand... You'll run into some that will taunt and mock you if they manage to win on time.
And sometimes they even get offended and angry if you play well, as if you are being a jerk by taking their hanging pieces. :D
Why chessplayers are arrogants and have an enormous ego?