If only "proven" players were worth putting your faith into then the "unproven" players would never become "proven". Same goes for managers.
Yes, but sometimes your team is in a more healthy position to allow these unproven players to prove themselves. On Sunday we will be without Lovren, Lallana, Lambert, Schneiderlin, Rodriguez, Shaw, and Chambers, and now you want to start giving these unproven youngsters a chance?
Again, this is Jan Poortvliet type lunacy.