Fear is an essential human response. If we didn't feel it, we couldn't protect ourselves from legitimate emotional or physical threats such as Tesco burgers or promiscuos older ladies at Christmas parties. But often we fear situations that are far from life-or-death.
I think back to when I was an intern, and the immense fear I had everytime I got my Director a coffee (presented head down with a subservient cower of course). I'd stress about whether I'd made it too weak or too strong, and if my googling of 'what is a macchiato' had resulted in the correct answer at all. If stories of him were true, should the drink not allign precisely with his high expectations, he would surely fire me.
Fortunately for all I quickly learnt how to make good coffee - then shortly after that fear wasn't a very desirable quality to have as an employee. If ever he was going to brief me on anything other than hot drinks, I needed to stop being such a bitch and grow a pair pronto.
Fear is never a solid foundation for any healthy relationship - business or personal.
You don't buy your partner flowers because you're scared she'll leave you - but because you love her. A dog shouldn't fetch a stick for its master because its afraid of being beaten - but because it enjoys the game.*
Isn't it better to build from respect and common goals, rather than fear and obedience?
And to finish, what better than a succinct quote from a clever bloke;
"He who has overcome his fears will truly be free" - Aristotle