You are correct that some have replaced them with manual tensioners and been happy with that. I put a manual tensioner on my KLX, but for me, it was not a solution. I found that there were problems with that setup: difficult to adjust properly (no way to really know for sure exactly how much tension is "right" and exactly how much you are actually applying by doing it manually [although there are some voodoo-magic methods like listening for how loud it is or that sort of thing...I don't buy that though, because such methods are inherently imprecise/inconsistent] -- meaning it could be too much or too little -- either of which can be problematic), the adjuster being prone to spontaneous loosening (which would be another possible source of CCT failure), too-high frequency for needed adjustments (another maintenance pain), and so on. Others may disagree, but in short, for me, the manual tensioner was worse than the also failure-prone automatic.
Indeed, I was not the owner of the Honda in that video (sorry if my post made it seem that way). I was just upset that, from my perspective at least, Honda completely destroyed an otherwise-great little bike, and can't be bothered to make it right. Some will say that I blow this sort of thing out of proportion and make it a bigger issue than it is, but for me (and it seems you feel similarly), there's just no excuse for these little nonsensical issues (or at least no excuse for manufacturers' not promptly fixing them when they do show up).