That sounds like a reasonable factor to include in the overall picture.
You would also have to consider the internet, smartphones and gaming too IMO. I think the elasticity of the mind weakens when a person focuses intensely for hours and hours at a time on the limited experiences those machines offer. Especially when the fascination with it begins in childhood.
After the end of the Cold War, this country lost its sense of purpose.
Now we are a “Seinfeld” Country, a country about nothing.
Smart phones— dumba@@ lazy people of any age.
And the new one “Artificial” Intelligence... cannot and will not replace ACTUAL intelligence, but the overlords of techie world want to make us all slobbering idiots.