"Why? Complacency and a want for the convenient. To a large extent we are no longer willing to take the time to do things 'properly'. Unix systems are classically 'set up once and forget it,' meaning that setup can be painfully difficult and trying, but after being set up you never need to think about the OS again. This no longer accurate in the Linux world. We want the shiny installer that a brain-brain dead rat could figure out how to use, and we want the package selection menu provided by Ubuntu even though it often results in a polluted system, and potentially breeds security issues.
"The ability to exercise control over a system is one of the attractions that brings people to Linux, we are getting rid of it, because we are lazy. We want things to be easy for people, but those types of people often do not care enough to bother with Linux at all, let alone understand what Linux is and why it's important. This is also why we see Ubuntu respins every where we turn our heads, and Debian respins on the backs of our eye lids. It's easy to do, and so we do it. We don't take the time to learn how to do things 'the hard way' or the 'right way,' we just want our solution, we want it now, we want it to be easy, and we want it readily available... because taking the time to search for it is just not worth it."
