Well I think its important because well, oral tradition can fuck up the original story. If Erasmus was using copies of copies of copies, which he most certainly would have been considering that there were no printing presses back then. You would have to assume for him to have a legit version of the NT that every copy was copied accurately and historically we know this not to be the case when people copy, copies. Not to mention the oldest piece of surviving book that has been found (to date) to date the original gospels on is the P-52 fragment which is literally just a few scribbles.
Combined with the fact that there are SOOOO many versions of the original gospels written by different people. We have to accept that the validity of them are suspect at best. Especially since they were copied 10s of years after the original gospels were written. It makes sense then why the authorities in Rome would need to stamp out the versions they didn't want and why so many different sects existed, Gnostics, Arians. etc.
So its kind of a tough sell to say that the modern bible is based off of old Alexandrian texts, when the texts themselves are suspect to boot.
At some point someone in Rome decided "well this is the shit were gonna use" and "thats the shit we aint" What prompted such a decision? Power? Truth? We will never know, but we do know that Constantine may not have even been a real Christian, if thats the case he merely converted to unify a crumbling empire, which I would understand considering how fast the Christian cult was growing.
Here is P-52
View attachment 15031
Thats what we have to go on...