It does NOT say "we now have a more sure word of prophecy
in the scripture"
It says "we now have a more sure word of
prophecy" (because we "now" have prophecy
functioning in the church).
"We have also a more sure word of prophecy; whereunto ye do well that ye take heed, as unto a light that shineth in a dark place, until the day dawn, and the day star arise in your hearts:" 2 Peter 1:19
Will you go so far as to say that they didn't have prophecy FUNCTIONING at the time Peter said that?
That would be hard for you seeing as how you've more or less said that "scripture is prophecy" and "Prophesying= creating scripture" and what Peter was speaking is now scripture. So, by extension, Peter was prophesying (creating scripture) as he wrote this.
BTW, I do not subscribe to your definition of prophecy. But that's not to say I dislike you.
Love in Jesus,
Kelby