Obviously the same thing is taught in the Catholic churces, since the families there are no larger than they are in the Protestant churches...
But, for some reason, the fact that people who were taught by the Apostles said the Apostles told them something requires some sort of "proof" that pleases those who do U-turns whenever they find it convenient to do so.
The apostles provided their truth to us by way of the scriptures...And contrary to your claim the apostles didn't just tell us to prove a couple of things, they said,
1Th 5:21 Prove all things; hold fast that which is good.
Translated, that means if the Catholic religion can't prove what it says, don't believe them...
So who do we believe??? The inspired words of God or the Catholic religion???
Too bad Rorschach Test Protestantism rejects what is clearly stated in Scripture in favor of whatever suits the individual Self and Self Alone ink blot viewer.
So, how did what was a sin for over four hundred years become a virtue ? Where's that in Scripture, somewhere in the I Trojan or maybe the Epistle of MeeSo ?