Let's say you take your brand new car in for a service, very expansive brand new car that developed a problem, anything wrong with the mechanic learning how to fix it From a video? Sure they can pass that knowledge to users....but is it the correct knowledge or thier interpretation of it....
For clarification -- are you comparing replacing a transmission with replacing an iPhone screen? Dissembling a car's console to replace a steering wheel airbag to Disassembling a iMac to replace the hard drive?
Macs and iPhones are no where near as complex as cars. Repairing iPhones and Macs is really not that difficult of a learning curve at all. Yes, it can be done with video training. How do you think all those people in Mall repair kiosks learned? All those middle and high school hobbyists?
This whole thing is much ado about nothing. I'm all for being critical of Apple where it deserves criticism. This is not one of them.
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Perhaps Apple should make there next keynote a video and see how people react to that.
But they do -- they make it available after the live show. That is how many people do view it. Personally I would love it if they just released a video instead of a live event so I could skip though the 1 hour and 40 minutes of BS and get to the 20 min. of info that I actually want to see.