Because that's not what he's saying - he's saying every Wordpress user should just blindly update when a new version is available and hence there is no problem in the Wordpress world. This is not sensible advice to resolve the potential issues since (a) most users will not have access and/or not understand what that means, and (b) the "update straight away" mentality makes you more susceptible to these bugs. This is, after all, why there are beta testers, why people don't install XP service packs for a looooong time to ensure there are no others issues introduced, and - no doubt - why those people who installed the broken version of Wordpress mentioned above, wished they had just waited until it had been tried and found to be flawed by other users first.
If for example, you know Honda had safety flaws in some of their cars, do you not think it would be sensible to know which models to check for which flaws before you buy? Or do you take Faevilange's attitude which is to not worry about it, buy the car without checking the model or whether the known fault has been fixed, and happily drive it down the motorway with your kids in the back... but make sure you take the car back if they send you a letter advising there's a safety issue? After all, Honda sell lots of cars so they must be safe and his Honda has never gone wrong...
