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" The local mechanics are often more skilled and more experienced than their dealership counterparts (simple money explains this). The whole idea every manufacture found some unique solution to complex rules and regulations, or that skilled mechanics cannot buy the equipment needed to fix these cars is just not true."Dealership mechanics are usually more junior (less experienced) than independent mechanics, but they spend all their time working on a much smaller range of models, so they're generally better on those vehicles. Having every special tool, and a great deal of training helps too.
>"If nothing else, the number of videos on youtube telling people how to properly fix their vehicles when their dealer gives them some BS diagnostic should indicate the skill level of those dealer shops."
In general, the dealers are very good with recent models, and less good with older ones. The people doing youtube videos are often ex-dealership mechanics, who have a lot of experience with older models, and are usually better than the current dealership staff (on the older models).
>"The less technology that is only fixable by the company's high priests, the better. If they cannot build serviceable items, then maybe the device is too dangerous to be in public. "
There are many devices which are extremely difficult for third parties to service, including aircraft engines. I don't think this necessarily means the items are dangerous, but it does mean you should consider your maintenance schedule and provider when making a purchase decision.