I grew up in strictly religious catholic household - far stricter than any other family in the district even back in 80's Ireland. There was probably a lot of similarities. We had Saturday confession, Sunday mass, observed lent with daily dawn mass and daily penance, daily prayers several times a day. Sex ed was entirely from catholic doctrine - so unwed sex is sinful, contraception is sinful, foreplay is sinful, lust is sinful, you get the idea.
My siblings and I all turned out normal enough despite this upbringing, and have varying degrees of faith ranging from sorta Catholic to total athiest. But young adulthood out in the modern world on our own was a steep learning curve for a few of us I think!
As long as you counter the indoctrination with other information or make it part of wider discussions your kids should be ok. Even if you can't, their friends will, their social media will what entertainment will. He can't control all that for each of them all of the time and certainly not when they are teens and have their own thoughts and doubts and feelings on faith.
As mentioned by a PP having a first hand experience of a devout mindset can set you up to understand many of the issues facing humanity historically and to this day, how laws were formed and just general social norms to an extent.
I'm atheist, DP is barely catholic but still there's some elements that's important to him. DS goes to a nominally catholic school but it's light enough on the religious stuff. He's recently queried death and dying due to his grandparents passing recently, so I explained what Catholics believed, but also gave him a brief overview of some other religion's beliefs surrounding death and dying to give a more rounded view because I can hardly insist heaven is real when I don't believe it myself. So we had a good chat, agreed nobody really knows for sure and people believe what gives them the best comfort. He likes the idea of reincarnation and had some good fun guessing who might come back as a newt. 