Quote Originally Posted by Assertn
Lol... a variation in which one seal kills the jinchurriki's mom and leaves the kid with a weak seal that allows the demon to drive him insane, while the other seal summons a death god which devours the souls of its target and summoner?

I can see how time could be a factor in that.
Well the fourth did die after performing the sealing technique. The exact circumstances behind his death is still unknown so we can only assume that it's likely to be from using the jutsu.

The sealing techniques shown so far seem to involve the death of the user.

It's a stretch but Gaara weak seal might be due to his mom not performing the technique too well.

I agree that a lot of the revelations are bullshit, but at this point i'd rather just try to make them sound plausible than give up on the manga altogether.