Certain things Apple does make sense, but are not conventional wisdom.
Conventional wisdom - your company needs to make a vast array of products so you collect money from every possible market niche that is remotely related to the industry you are in. Example : GE, Sony, etc. These companies make everything under the sun and a lot of it is mediocre, but it technically works and makes revenue.
Apple’s strategy - instead of trying to do everything, do just a few things “insanely great”.
Conventional wisdom - when you have an engineering project, you look at the marketplace and create a list of the features the competitors have or that you find from customers to be the minimum. Once the product has the minimum features minimally functional, ship it.
Apple’s strategy - it’s better to do extremely well than ship a product prematurely. If you can’t make a product not suck - due to inherent technical limitations or because the idea was bad - kill it. It’s not good enough to simply check the box on every feature in a product, they all need to be the best you can make them, and it’s better to have fewer, better features than more.
Conventional wisdom - customers want the freedom to do whatever they want on their devices.
Apple’s strategy - it’s better to make the devices only capable of doing the things that they do well, and not the things they do poorly. This rule also applies to third party applications. This is why iphones don’t have multitasking - multitasking destroys battery life. If iphones could multitask, they would prematurely run out of power, and this reduces the value of the apple brand as people will perceive the devices as being bricks that run dry on battery too soon.
Conventional wisdom - collect all the money you can, however you can, and pinch whatever pennies you can. Specifically, accept bribes from software companies to ship your computers and phones with bloatware and time limited application demos. Deny any warranty claim you can to reduce expenditures on technical and warranty support. Use cheap, shoddy technical support from Indian shops.
Apple’s strategy - They don’t permit bloatware or nagware “demos” on their computers, because while this might get them short term money, it reduces the value of the Apple brand. They are usually generous in their warranty policies and are well known for repairing devices that recently lapsed on the warranty coverage. They don’t use Indian tech support.
How much of this was Job’s doing? I don’t know, but there is a reason why Apple is so successful, and it’s not just a mystical “reality distortion field” or “apple cultists”. People buy apple products and they are higher quality and usually worth the price premium.