What's the problem - we all have a choice
I have come to buy stock Android because I buy Nexus kit. I can't stand the bloatware that comes with Samsung, so I don't buy it.
I think there is a choice - you can buy stock Android, or Google could release a version of stock that people could update as they wished. The problem is that the great unwashed simply stump up cash to buy the latest and greatest from Samsung or whoever, and never think of the updates. Since everyone buys a new phone every year or two, it is not so great a problem.