You might want to read my reply more carefully. I never stated it to be the pinnacle of redundancy. Besides, your statement isn't accurate either.
With for example RAID1 vs. pool of drives, I'm not so sure that you have a greater chance of redundancy with the pool of drives as you do with RAID1.
As for comparisons to RAID10, RAID5 and RAID6, at least in the case of these RAID levels, you have "some" chance of recovering lost data, whereas a pool of drives does not.
This is why unRAID, FlexRAID, SnapRAID, disparity etc. are far superior for our purposes, they are the best of both worlds and only sacrifice maximum performance to get there.