Then you should be trying to encourage new players to participate in raiding, not locking them out. As it stands, the current system serves as something to slow character progression and prevent them from taking part in the new raids.
You forget that Tomestone of Lore and Weeping City have lockouts. Even if I wanted to farm gear there, the game prevents me from doing so. I have been farming for ilvl 220 gear from Alexander Midas, but after several dozen runs, I'm still short 1 Shaft and 2 Bolts from getting a full set. However, raid groups on Ultros refuse to even talk to you unless you have a full set of ilvl 230+ already.
And that is something that needs to change. Just because other games are doing this doesn't mean it's always the right thing to do. Maybe you'd have more people interested in raids if they could actually gear up to do them. I don't consider a lot of the raids skill because failing a mechanic is punished with instant death and instant death is never a test of skill. It's a test of memorization and if you take too long, you die anyways.