My initial response upon reading your post title was" “How could anyone
NOT want to become Catholic?” → my answer was “I did

”. The Church has the fullness of the faith, we have the Eucharist, we have the saints and our mother as intercessor, we have unbroken apostolic succession from Peter! We have the literally thousands of years of great minds and writings. And sooo much more!
Rien, I agree with jc. I’m so sorry you have not seen the renewal of the faith. I have never met anyone who left the Church (the idea truly saddens me) and
knew what it was that they left. Those leaving do not know their faith, or do not wish to conform their desires/urges/ideas of how life should be to the teachings of God. We are called to know our faith, to be ready to give reason for our Hope at all times! I think if anything, Catholic laity is lax in our desire to know our faith (I know I suffered from this), to read the teachings of the Church and in doing so we will understand that the Church has reason for her teaching.
I can list so many reconciliations to the Church (original converts) and those who have come back after absence → aside from Scott Hahn, and all are highly intellectual: David Currie, Curtis Martin, and check out David Sri, Tim Gray. So many that never left(ex): John Paul the Great, Mother Teresa, and Pope Benedict XVI. And so many friends (including myself) that were brought to the Church because of her Truth!
I honestly believe (and I do not mean to offend anyone) that anyone who truly searches for the truth will find the Church. As Catholic’s, let us do what our late holy father urged us : let’s change the world. I can’t even begin to describe the beauty I’ve found here.
God bless!
PS In response to scandals, the percentage of sexual abuse cases filed in non-Catholic organizations is far higher than those in the Church…but as (I believe) GK Chesterton said, the only acceptable discrimination left in this country is that against Catholics (I am paraphrasing).