It's a matter of discernment of the workings of the Kingdom of Darkness

Threads like these on the Traditional Text vs. the Critical Text are amusing in how they show up the different levels of development of Christians:

Here
Here
&
Here

Teellinck in his Path of True Godliness presents three levels of development of Christians:

Little Children in Christ
Young Men in Christ
&
Fathers in Christ

The manuscripts arguments and issues are a matter of spiritual discernment, pure and simple. Those who are still Little Children in Christ aren't able to discern attacks from the Kingdom of Darkness. They havn't developed as Christians to the level where it can be discerned. They swallow anything man presents to them regarding the Word of God. (They aren't capable of seeing things, for instance, like the fact that the attack on God's Word initiated in the 19th century is of the nature of a progressive attack rather than merely a one-time audacious defiling of God's Word.)

Teellinck defines the above categories in a few ways but in one central way which is the ability to discern good and evil and to discern attacks from the devil and his kingdom of death. Those who accept the Critical Text and the versions of the Bible based on it (New Living Translation, New International Version, New American Standard Version, English Standard Version, New Contemporary Version, all Roman Catholic versions, etc.) are simply not yet able to discern the devil's attack on God's Word. They are simply still little children in Christ. Those who are able to discern that the Critical Text - Satanicus/Vaticanus, presented to the world by spiritualists and atheists in the 19th century - is abomination are young men in Christ and fathers in Christ.

The canard that ability to discern the devil's hand in the Critical Text and versions based on it is "KJV-onlyism" is all the little children in Christ have as a defense. To, though, further discern the worth of the AV1611 is also a matter of development. In this case development of ability to discern language and levels of influence and poetry and literature and so on.

Teellinck also defines the levels of development of Christians by how aware we are of our own weaknesses and sinful nature. Little children in Christ are vain and get very upset when their cherished notions are exposed.

Read the threads linked above and see how the subject matter is really, foundationally, based on development of discernment. In this case discernment of evil in the ongoing attack on God's Word that began in the Garden...