How do you deal with all the variants in the TRs?
While there are minor differences, they are not on the same scale as those in the RTC advocates preferred texts: Codices Aleph & B. These two texts were shown by HC Hoskier to differ over 3000 times in the Gospels alone. And that they were either the work of or influenced by the gnostic heretics.
The differences in the TRs are either explained by the fullest version of the text (Scrivener) or they are shown to hold no difference in the understanding of the passage. And since none of them teach open heresy, they are completely different class of variants than those found among the manuscripts making up the critical text editions.