Why are most gallery owners and curators bipolar?

Is it because they are frustrated artists and wish that their works were being featured instead of others'?

Is it because the general public does not give them importance and acknowledgement?

Is it because they are not making enough money for themselves?

Is it because they would rather be working in New York, San Francisco, Melbourne, Sydney, or somewhere in Europe?

Is it because they frequently argue with the artists they are showcasing?