The "infallibility Debate" is actually much more complex than that. To say otherwise would actually do harm to the the standing of the Bible as the Word of God.
For example
Matthew 27:9, quotes a passage - or at least purports to quote a passage from "Jeremy (Jeremiah) the prophet..." Then, Matthew proceeds to quote from
Zechariah 11:12-13.
Either Matthew fails the "Infallibility test" and is to be considered one of your "heretics and apostates," or there's something amiss with your understanding of the "Infallibility of the Scripture."
There are many important manuscripts which have added "in Isaiah the prophet" to
Mark 1:2. The only problem I see with this is that
Mark 1:2 is quoting Malachi.
The oldest manuscripts all leave out the ending of
Mark 16. Only you new fangled types really insist upon retaining it. Erasmus could not find a single manuscript that included
1 John 5:7, until someone brought him a manuscript from the 11th century (1,000 years after John had died) with the "missing words" written in the column.
Several different manuscripts - D ((E) S 1006 1424marg with asterisks, possibly indicating a questionable passage) (
L P omit 7:53-8:2 and place the rest in asterisks) Fvid G H K M U
G 28 180 205 579 597 700 892 1009 1010 1071 (1077 1443 1445

184

211

387

514

751

773

890

1780 include 8:3-11 only) 1079 1195 1216 1243 1292 1342 1344 1365 1505 1546 1646 2148 2174
Byz aur c d e (ff2 omits 7:53) j r1 vg peshmss harkmss pal bopt slavmss-marg eth Ambrosiaster Ambrose Jerome [(UBS in [[ ]]) (Soden) (Vogels in [[ ] ]) Merk Bover (Souter in [ ]) Hodges-Farstad TR] -
... all include the story of the adultress after John 7:52 as you're accustomed to seeing it. Most, however place the story elsewhere in the Gospels or omit portions of the story.
James 2:20 - is "faith without works" - 1) "unproductive," 2) "dead" or 3)"empty?"
- H PISTIS CWRIS ERGWN ARGH ESTIN -- "faith without works is unproductive" -- B C* 322 323 945 1175 1243 1739 am** cav colb dem div dubl ful harl hub sang tol val sa arm [UBS WH Tischendorf Soden Merk Bover Vogels NEB Souter]
- H PISTIS CWRIS ERGWN NEKRA ESTIN -- "faith without works is dead" --
A C** K L P Y 049 056 0142 33 81 88 104 436 614 629 630 1067 1241 1505 1611 1735 1852 2138 2298 2344 2412 2464 2492 2495 Byz p t am* pesh hark bo eth slav [Hodges-Farstad TR]
- H PISTIS CWRIS ERGWN KENH ESTIN -- "faith without works is empty" -- P74 ff?
This doesn't even begin to scratch the surface. Of the tens of thousands of variant readings among the manuscripts - most don't really affect major doctrines all that much - but which of the tens of thousands are THE INFALLIBLE ones?