You can?t apply secular/worldly values to a spiritual issue; the two philosophies are not compatible.
The reason there haven?t been female bishops up until now isn?t neccesarily down to sexism, although that isn?t to deny that there may well be sexism in the Church of England. I suspect that there are varying degrees of sexism in most Christian denominations, but it?s important to separate genuinely-held, Biblically-based beliefs from mere tradition and prejudice; ie ask whether we do something because it?s Biblical or because it?s just what we?ve always done.
There?s a strong Biblical case for women not having a preaching role in church; it all comes down to our interpretation of certain New Testament passages. I?m not 100 percent sure where I stand on it myself ? I?m almost persuaded but there are other interpretations which unsuprisingly I find more appealing! However, as a Christian my duty is to do my best to obey God?s word instead of trying to twist it in order to fit in with my own values and lifestyle.
On a personal note, I used to struggle a lot more with my denomination?s understanding of Biblical passages of this type as they conflicted with values that most of us take for granted. It took a long time, but I have gradually felt more at peace regarding these issues and I?ve found that there are lots of other ways in which I can serve God, none of which involve making scones or arranging flowers!