There was a man who joined the RCIA group I was in, towards the end of my time there prior to entry into the Church. He made no bones about it that he was there because he wanted to marry his girlfriend who was/is a devout Catholic.
The following year he was baptised and confirmed and is now so deep in the faith it is hard to imagine he is the same man who came to RCIA saying he was only there so he could go through the motions and marry his g/friend. They have a lovely baby boy and another on the way, and he is part of the reading team for Mass. He positively glows with God’s love.
I guess what I am trying to say is that we don’t know what God has in His plans for any particular person. A wrong word at the time he joined the RCIA class could have sent him away and changed his whole future.
Here in England there is enormous competition for places in Catholic schools. It is widely acknowledged (if grudgingly by those who hate our faith) that Catholic schools in the UK offer the best of educations. It is well known (and reported on in the media) for some parents to join or try to join the Church in order to get their children into a Catholic school. They think they have a better chance as opportunities for non-Catholic children are limited to the number of extra spaces not needed by Catholic children. Once the kids have their school places, the parents are rarely seen at Mass.
In both situations, I guess one has to trust that God knows what He is doing.
How are we to foresee that the children from either the parents who lied to get into Church or those who initially join to marry a Catholic may one day end up Pope or as a Saint!! God plays the long game…His view is eternal.