Agreed, and well worded. Never in computing history has a walled garden like Apple's existed until the iPhone. Distributing and finding apps wasn't always simple, but then again, the need for a central browsing experience to find and download apps was never truly a thing before -- maybe outside of Steam for games. The key difference with Steam is that the same games have always been available on other distribution platforms, generally, so it doesn't suffer from the same limitations.
Show of hands, how many people actually spend multiple minutes (or hours) just swiping through their respective App Store just to find something new and interesting?
Aside from the store experiences, the web's powerful (gasp!) ability to find and download content including Computer Applications™ has always been its greatest strength. App stores are a net detriment seeking to protect the lowest common denominator: the uneducated computer user who hasn't bothered to learn everyday security practices to avoid downloading malicious apps or vetting software developers on their popularity and/or security themselves.
This takes a little knowledge and practice, but this isn't much different from shopping for good produce in a grocery store. Avoid the rotten fruit, and use your friends/family to help you judge what's best! That's the beauty of freedom on our devices, as it enables the power users and enthusiasts to enjoy these devices at their fullest, without senseless obstacles offering unsolicited "protection".