You're right - that's why macos definitely hasn't spawned suspiciously debian-like package managers in an attempt to handle all these problems.
And if we're talking about "app bundles", if you dig a bit deeper you'll find most of these applications which "just work" just bundle all of their dependency libs. God knows if they bother to update them or do a security release if vulnerabilities are found in their bundled libs!
Mother of God! Very popular argument. No one cares (in terms of architecture).
> vulnerabilities are found in their bundled libs!
Yes, god only knows how entire install base of mac and windows machines works today (this problem is not as big as you try to present here).
Your arguments like debate about linux monolithic and minix micro kernel architecture. Minix is more advanced in theory, linux (not linux desktop) working in reality.
The issue being that, for a lot of people, they often work a little too well.
If you're going to follow the philosophy that caring about the correctness, lack of duplication and security of an installed application is too esoteric to be relevant, I'll remind you that you're entirely free to do that to any extent you like with linux. Equally people like me are free to tell people who do that that they will receive no support from me for such a setup.