Or is it because you are a scientist, and you don't really want to believe it so you put it aside and say it isn't true?
Read this -- there are many incorrupt bodies. It's not just St. Bernadette.
BTW, if you were baptized and rasised as a Catholic, you are still (and always will be) a Catholic. You are just an inactive Catholic it seems. We invite you back to the church. Find a priest you can talk with and get your questions answered. Being Catholic: Sacred Things, Relics and the Incorruptibles
Faith doesn’t require miracles. I can believe in Bernadette’s saintliness without having to believe that he body is incorruptible. If she *does* actually chide me in the afterlife, hopefully we will all have a good chuckle at my doubts.
I understand why such beliefs are important to some of the faithful. If it strengthens you to believe in these cases, blessings upon you.