In reality it is not. There may be circumstances where technical reasons can be found to refuse to give a get, but this is invariably not a wise move. The fact is that if a woman does not want to remain married forcing her will only keep her there in body but not spirit.
Also, it seems to me (although its obviously something that can’t be proven) that men who would not dream of withholding a get no matter what the circumstances tend to make good husbands and stay married!
I would venture to add that as a society we are not hard enough on get refusers. Get-refusal is nothing other than a form of abuse and needs to be treated with the same contempt that we reserve for paedophiles and the like.