If people take away the more inspirational messages of the stories of Jesus, Krishna and the like that's great, but there are two problems that come along with it.
Firstly, not all of the messages that come out of the Christian mythos, certainly (I'm less familiar with Hindu legends), are inspirational, and the parts that I might find inspirational are not necessarily the parts that others would aspire to.
Secondly, lending any credence to these myths offers a blanket of acceptability to people who go further with their claims, people who claim these aren't myths or parables, that these are works of history, and those people typically aren't the people we need to be giving support, however unwitting, to. There are plenty of demonstrably real role models you can choose from, we don't need myths with baggage to inspire us.
O.