We have good reasons. One final note. Converting to Judaism makes one Jewish in every sense of the word, but being Jewish is much more than just undergoing a conversion process. Judaism is an experience that grows over the years . Traditions do not become traditions until they are practiced over time.
All traditions begin at some point.
For a Jewish child, his or her traditions may have started with mother, grandmother, great grandmother, or even with the patriarchs. With each generation the tradition becomes more set and meaningful. You can practice Jewish customs, making them your traditions, so that your succeeding generations will have a rich heritage to call their own, without converting to Judaism. Practice the customs and traditions of a Jew and you will have the majority or all of what you are seeking.