Why practice doesn't always make perfect.

I have a fear of travel, a sort of separation anxiety from my home. When I say travel, I mean staying a night or more away from home. It's a fairly powerful fear, but not overpowering. I don't fear and hate all travel. Indeed there are many circumstances in which I enjoy it. I don't do it that often and certainly less than I used to, which leads me to believe that my parents fear it will develop into agoraphobia. Let me put this hypothesis to rest. Granted that the decreasing frequency could be alarming; but is not what it looks like. I have hated (I mean really hated) being away from home for as long as I can remember. However, this dislike has not increased; I have merely become more willing and able to say no. I remember being miserable as a child because I thought it was what normal people do and didn't want to let down my parents. Now I realise that that was wrong and it has enabled me to find some happiness. My parents still want me to travel, yet I am in control and I chose when I want to make the leap.
This resistance is sometimes construed as an inability and their suggestion is that I should do it to get some practice, because that will make it easier. They are wrong; but not through neglect or ignorance. Practice can make perfect, but not in this situation. When I was doing it a lot it made me unhappy, and the more I did it the more miserable that I became. It is a feature as built into me as my liver, and no amount of practice is going to change what is such a fundamental part of my being. It can (and often used to) only lead to pain and misery. I can and will do it, but only how, when and where I want to and in circumstances of my choosing. I am perfectly happy not to suffer from wanderlust, and any attempt to make me develop it will not be for my benefit. Sometimes you just have to accept someone for who they are. This is not something that can be rectified any more than a man flapping his arms in an attempt to fly would be.Well, I wasn't born with 'wings', but don't worry for me, for I am happy this way