Bullcrap. The oldest boomers turned 20 in '65. If "you didn't build that" was ever a true saying, it was about boomers and the post-WW2 prosperity.
Some of what we built ended up being helpful, productive, and good. And some of it has left a scattered jigsaw puzzle of a world for our children to try to decode.
That's an interesting way to describe the vapid moral climate that boomers fostered. Now with my kids, I have to be very careful about the proliferation of drugs, socialism, and free sex they've glorified aloud since the 60's.
Boomers are those born 1946 through 1964, so think age 19 in 1965.
The first presidential election in which all boomers were old enough to vote, was 1984, Reagan's second term.