A couple years ago I dubbed this trend "Flanders Computing" [1]. I haven't really given much thought about its origins, but it's probably got to do with the increasing demand for happiness that we Americans hold dear.
Collectively I think it's entered the American psyche that the answer to happiness is to avoid anything that makes us anxious or uncomfortable, which results in that toddler-level approach in many things. i.e. Ban things labeled "toxic", ban the boo-boos, keep everyone safe with happy feelings in this space only. But admittedly my thoughts are incomplete.