I think you are just making this up.
Uspensky read Sinaiticus easily
Uspensky .... a
scholar, archaeologist, orientalist, and cataloguer of the ancient manuscripts of the
Eastern Church.
I have never heard a claim that the monks in Sinai could not read the text. If you have any actual evidence for your claim, share away.
Monks in Sinai .... scholars NOT. The Codex became disbound and separated, and lost.
Codex Sinaiticus and the use of
manuscripts in the Early Church
Christfried Böttrich/The Expository Times
"After the
12th century, the codex
seems to have vanished silently from the desks
of those devoted to theological work.
Losing its function became the greatest danger
for the Codex Sinaiticus as time went by. One undatable
day, the cover must have been removed
from the book which then remained as a huge
pile of pages. Unbound, it was only a question
of time before the dissolution began. This process
is a matter for speculation: at first some
sheets from the beginning and the end were
used for secondary purposes like bookbinding
and other things; a few of these pages got lost
in the room beneath St George’s chapel in the
northern wall where they were re-discovered in
1975;59 someone had separated a bundle from
the first, already incomplete Old Testament section
as recycling material, setting aside the New
Testament part for a while—and the part taken
out found its way into the ominous basket in the
library; the New Testament including Barnabas
and Hermas disappeared for sometime, being
kept in a side room of the father oikonomos’
cell."