The big difference between Catholicism and Buddhism is that Catholicism comes from the Revelation of God to man. Throughout the Old and New Testament we see God directly revealing himself.
Buddhism began with a person who was searching, and he came up with many esoteric ideas, but it is not the Way, Truth, and Life which is what Jesus is.
Buddhism is “a way” thought up by man, and Jesus is THE WAY revealed to us by God.
If a person has a hunger for Buddhism, it can very well be that they are desiring a deeper prayer life.
We have Doctors of the Church on contemplative prayer: St. John of the Cross, St. Teresa of Avila, and St. Therese of Lisieux. Many are not aware of the treasures we have in our Church from the saints.
Someone’s desire to learn more about Buddhism can come from a desire for a deeper prayer life in the Lord, who alone can satisfy all our desires.