Let me straighten out a major misconception.
I do believe in the eternal security of Christ's followers.
Jesus will deliver each and every one of them safely to their eternal destination.
There is no doubt in my mind.
HOWEVER....we all have free will in this arrangement. We can decline His invitation.
Or we can think that we are following Him, when in reality, we are following a false teacher...don't forget that Satan can transform himself into an angel of light...
We can willfully sin, and thus lose our salvation.
There is more to this than a simple profession of faith. There is the action of actually following Him....as in obeying Him.
There is a yoke that we must accept. There is a burden we must bear.
Let's not forget that.
For me, the debate is about who is a believer...not the final destination of those believers.