Jesus's parables are introductory material spoken largely to unbelieving Jews prior to the resurrection (i.e New Covenenant). Jesus revealed a lot of new information to His disciples
after the resurrection. Prior to the resurrection God had to get Satan to unwittingly crucify Jesus - and I think that was the reason a lot of information did not come out until after the resurrection.
1 Corinthians 2:8 None of the rulers of this age understood it, for if they had, they would not have crucified the Lord of glory.
I look primarily to Acts and the Epistles written to New Covenant believers for doctrine and will not dissuaded from using them.
I don't know the disposition of those who would become His Sheep before they are converted. Is it lost sheep? I don't know and I don't see Jesus clearly explaining it. I don't like having the wool pulled over my eyes and I prefer answering questions that have scriptural grounding.