And as explained numerous times before it does not mean what Romam Catholics want it to mean. For you to continue to post this is disengenuos.
If you go to Luke 1:28 and look up the Strong's Greek for G5487 or Favored, it in no way means she is without sin. Noah found favor with God because he believed God, not because he was without sin. It says Noah found grace with God which means he needed it. The other sentence there saying his generations were perfect, just means his flesh had not been corrupted by the Fallen angels of Gen 6:1. The whole Bible is founded on the seed of the woman killing the seed of Satan. Abraham was a pagan, but he believed God and righteousness was imputed to him. Mary received the seed of God, but she was not without sin. Jesus is the seed of the woman. Jesus is the seed that kills Satan's seed, the Antichrist. It won't be Mary coming back in Revelation to kill the Antichrist and his followers. If Mary was sinless, we wouldn't need to sacrifice Jesus. God used many faulty people to accomplish His purposes. Jonah messed up 9 ways to Sunday, yet God used him for His glory. Mary was blessed beyond measure to be God's chosen vessel, but can we say John was blessed? John was the one Jesus loved. Peter? Was Peter without sin?
Mary had the unique position of needing her son to die for her sins in her place. Can you be joyous that your son is going to die to set you free? Peter said it would not be so when Jesus spoke of dying on the cross and Jesus told Peter to get thee behind me Satan. If The whole world stood up to protect Jesus from death, then God's plan for the world would have been thwarted and we wouldn't have a blood sacrifice today. Satan, being Satan, killed all the children in Moses' time and killed all the babies in Herod's day trying to kill God's seed. Why not kill all the child bearing aged women if Mary was the only woman God could use? Mary was just a girl chosen by God to fulfill His plan just as Noah, Abraham, and Moses, was used to fulfil the same plan.