That is a parable. A parable is not meant to be taken literally, but the object lesson behind it needs to be understood correctly and taken seriously. The object lesson of this parable is not freewill vs. predestination. The object lesson is that there is more joy in heaven over one sinner that repents, than over 99 just persons that have no need of repentance. Now if the sinner has been “predestined” by God to repent, what is there to “rejoice” over if he inevitably and irresistibly does what he is “predestined” to do?But you cannot compare those wooings to the drawing of God. It's not just Him wooing, but something much more powerful, much more forceful than that. In Matthew 18:12-14, we see the parable of the shepherd and the sheep that went astray. He did not merely call out for him, but searched for him. And when he found his sheep that went astray, he put him on his shoulders and brought him back into the sheepfold. This also includes Luke 15, the part of him putting that sheep on his shoulders.