It's quite presumptious to assume people who don't care about their apps as much as you are all brainwashed. I've always found many of the default apps to be "good enough" that I didn't mind using them, and I know I'm not the only person who thought so. Lately they've degraded to the point people are complaining.

Besides that, the software problems affect their entire software base, including parts that can't (easily) be turned off or removed, like iCloud, Music, the iOs task switcher, etc.