That's not true. It is entirely possible for a juggernaut to do nothing wrong, and still get stealth capped because of instant whirlwind.
Phase walk, mind maze, phase walk, cap. Juggernaut CC breaks at 4 seconds (after calling out in chat), juggernaut saber throws, assassin whirlwinds, then caps.
I didn't read Earnestbunbury's post. I was commenting on the fact that I've seen skilled juggernauts get sap capped, and there wasn't much that they could do. That's why an assassin, operative, or tank PT should guard.