Just look at the sexual improprieties among the priesthood which are now becoming known. Then we can understand the seriousness of the problem of practicing this unbiblical teaching.
The people mentioned in the first sentence are obviously NOT practicing Catholic teaching.
You may very well be speaking of the catholic church, but did you know that every Pope since the reformation, and still does today, that ALL men of the cloth, regardless of Christian faith, should be celibate.
After all, the Pope and the Catholic Church itself still believe they are the ONE TRUE faith, and all the rest are fakes.
I was raised a Catholic, I took catechism classes every Wednesday at 2 pm for 6 years. I know for which I speak.
I must admit, it truly taught me many things, and it was great to get out of School early every Wednesday.