I agree that our personal experiences will flavour what we do. Therefore we must be careful as midwives not to think that everybody feels how we felt when we had our babies. E.g. my first baby was born by primary c-section because of suspected IUGR 13 years ago, long before I became a midwife, and it was a real horror story for me. Part of why I became a midwife was to help other women avoid the ordeal I had to go through. But when training and later practicing as a midwife I discovered - surprise, surprise! - that there were women for whom it seriously wasn't a big deal if they had a c-section. Not everybody's the same. Just a few months ago I had baby number 2 - a homebirth as I had deeply wished for. All was fine and I was very happy. However, I was surprised how much labour hurt. I never thought it would hurt that much. Well, not for me in any case! (Hehe...) But hey, it did! Now I can understand women better whose labour is painful. But it would obviously be wrong to think that everybody's labour is painful. After all there are all these tales of painfree, even orgasmic birth! (I'd like to experience that with my next!)
Well, to answer the original question: Whether or not we have children and whether they were born at home or in hospital, vaginally or by c-section, painfully or pain-free, in a relaxed or a horror scenario, whatever we've experienced, it can only be a very little part of what any one woman might possibly experience. Our personal experience can never give us all possible experiences which women can have. So although our personal experience flavours our work as midwives, it is not the determining factor.
By the way, I know several excellent homebirth midwives, who have either no children or didn't have theirs at home. Also, after having experienced a homebirth myself, I do not think that it has made me better as a midwife than I was before.