You can run rookies on the line if you have veterans that can help them.
Our issue is we have so many guys that are inexperienced, not only do the green players have to worry about THEIR mistakes, but they have to constantly be on the lookout for the guys on the right & left of them making mistakes they might have to cover for. And in so doing, their attention is divided and they make even more mistakes.
So yes, you can put a rookie on the line. You cannot put 4 of them there. And you certainly cannot expect to be successful fielding a line of former TEs, DTs, Basketball players, Accountants, and Pizza Delivery guys.
This is simple stuff about helping people build experience and skill in a new position that ANY college coach likely knows. So I am doubly baffled by why our team repeatedly thinks this is a good idea. Because Carroll is whip-smart, there is no way he does not know this.
Even more frustrating in the assertion by Cable that 'college linemen do not know how to play OL anymore' because we need guys that can do things that college linemen typically cannot. If your system depends on a supply of resources that is in short supply or no supply, you HAVE NO CHOICE BUT TO CHANGE THE SYSTEM. You do not stubbornly push forward with substandard resources in order to keep the same system.
I am already repeatedly seeing guys blowing blocks in order to get to the second level. Apparently we put a lot of emphasis on this, and it is annoying. The emphasis needs to be on making your first block, because without it guys are being used as turnstyles as people rush to murder our RB or assault in the backfield.
So either we convert to a system that can use the current crop of college linemen available to our draft pick slots, or we quit tossing away average but decent linemen (like the guy that got released and ended right back on another pro-team like the Saints, as an example) because they are not mean and nasty enough. At this point, I would take 'able to do the job' over 'mean and nasty but incompetent'.
Asking Glow to master all this with no support, and likely having to help OTHER rookie OL is way too much.