You do take the verse totally out of context.God is not willing that any should perish.
Context of 2 Peter 3:
3Know this first of all, that in the last days mockers will come with their mocking, following after their own lusts, 4and saying, “Where is the promise of His coming? For ever since the fathers fell asleep, all continues just as it was from the beginning of creation.”
See, the context is that folks are questioning why Christ has not yet come back. (On a side note: This passage refutes the Preterist position. 2 Peter was written many years after their supposed timeline return.)
Read more of the context:
5For when they maintain this, it escapes their notice that by the word of God the heavens existed long ago and the earth was formed out of water and by water, 6through which the world at that time was destroyed, being flooded with water. 7But by His word the present heavens and earth are being reserved for fire, kept for the day of judgment and destruction of ungodly men. 8But do not let this one fact escape your notice, beloved, that with the Lord one day is like a thousand years, and a thousand years like one day.
In context, Peter is showing how the "word" of God formed and preserved the world, and therefore God's word is still reliable (even to our day).
To THIS context is the verse you quoted:
9The Lord is not slow about His promise, as some count slowness, but is patient toward you, not wishing for any to perish but for all to come to repentance.
The verse is NEVER to be taken that God desires, nor that God has obligation, to "draw" every person to Christ.
Some other verse would have to be used to support that view, but not this one.
The context does not give that permission.