Not so, in this case. Sor definitively did not use rest strokes. He discusses his technique very thoroughly in his Method. I agree that the melody needs to be brought out, but that does not necessitate rest strokes (as you suppose). Although you are clear of what you want, I was more targeting the OP for his use of the word "confirmation".
BTW, Sor would not use his ring finger either in this study, and thought nothing of continually repeating the same finger on the same string - alternation is not something he promoted.
But don't get me wrong. I'm not saying you have to use Sor's technique (admittedly a little odd compared to today's fashion) but when studying his music, surely it is legitimate to ask what the composer wanted, and how he might have played it? I can't see the harm in students developing an awareness of how historical practice differs over the decades and centuries. The music is enriched this way, I believe.
[And I (almost!) never mentioned Sor saying "“Never in my life have I heard a guitarist whose playing was supportable, if he played with the nails."
I don't think I'm alone in thinking that one of our GREATS had a very different concept of music and technique than we do today. When better to discover that than when you are a student?