Because being "dead in their sins" doesn't mean non-functional. That's the problem with your view. To be dead physically means separation of soul and body, as James 2:26 indicates.
So, to be dead spiritually means separation from God. We are all born spiritually dead; separated from God, just as Adam found himself immediately after he bit into that forbidden fruit.
Jesus made very clear that "the dead (spiritually) can HEAR and believe.
Jn 5:25 - “Truly, truly, I say to you, an hour is coming and now is, when the dead will hear the voice of the Son of God, and those who hear will live."
It could not be more clear: "when the dead WILL HEAR the voice of the Son of God". Note what it does NOT say: when the dead will be quickened so that they can hear the voice of the Son of God", which seems to be your view of things.
And note what happens after the dead hearing the voice of the Son of God: "those who hear will live".
So please note: the dead won't live until they hear. iow, they hear BEFORE they live. And they are dead WHEN they hear.
Your view does not line up with Scripture.
If you back up a verse you will read that they have "passed out of death into life" .....once into spiritual life they could hear.
Just like lazarus. "Jesus called in a loud voice, “Lazarus, come out!”
John 8:47 Whoever is of God hears the words of God. The reason why you do not hear them is that you are not of God.”
I do think were beginning to split the issue.
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