Lordship is not about mastering perfection. It is about desire and intent that from now on God rules your life and not you. It is about desiring God and a relationship with Him.
This is in contrast to those who care nothing for God and his Holiness but do want to escape the flames of hell.
I'm not sure if you're stating this as being the Lordship Salvation position, but it is not what Lordship Salvation teaches.
Just listen to John MacArthur's Works To You radio program, or read his books like "The Gospel According to Jesus"
Lordship Salvation is about objective works, not a subjective change in disposition. In the LS salvation view, someone who merely has "thoughts" and "desires" of holiness, but does not translate that into actual good works, has a spurious faith.
It's those on the periphery of Lordship Salvation who water down the objective aspect in order to cling to whatever assurance they once felt. Because they know that if they really examine their own life, it will not cut the mustard.
So clinging to Lordship Salvation on an intellectual level, then denying the nuts and bolts of it.
"Well, I must be alright, because I still "think" about God a lot. I still seem to have desires, and when my conscience is quickened, it must be the Holy Spirit reminding me that I'm a child of God, and that my behavior isn't up to snuff."
Lordship Salvation teaches no such subjectivity of thought. You are either literally, actively, practically towing the line, or you are not in Christ.
But, even Mac contradicts himself at points, like when he teaches on Romans 7.
It is a confusing mess, rattling people with a blurring of the distinction between faith and works. And the only solace is to turn to a subjective view of "thoughts" rather than "works"