You are not making sense. On the one hand you quoted Edgar favorably who thinks the best mss. exist today because they were either discarded or forgotten by the church.
Then you claimed that many manuscripts discovered in the 20th century are Byzantine.
Let me run this past you again. You think (along with Edgar) that the best manuscripts are around today because they were discarded or forgotten by the church. Further, you think that many of these (discarded and forgotten) manuscrips discovered in the twentieth century are of the Byzantine text-type.
But putting this together for you your response is simply no. That does not compute.
I'd like you to document some of these "many" Byzantine text-types you claim were discovered in the 20th century. I don't think there are any, much less many. At best a few of the papyrus fragments are mixed --but the majority are Alexandrian.