Some leave Catholicism and become Protestant and that is fine with you.
Some leave Protestantism and become Catholic and you may fuss a little but you accept it.
It become "deconstruction" only when one denies the Trinity or, worse yet, denies today's "traditional" Christianity.
And not one of us, not one, practices the brand of "Christianity" of Jesus and the Apostles. It has been "deconstructed", "improved", and made into a form unrecognizeable to the early Church. And that is fine with me.