That bit is obvious. The next generation benefits from the innovations of the previous generation.
But boomers knew about global warming, and refused to do even the bare minimum to help curb it. (More highways, gas guzzlers galore, effectively ban nuclear, anti sustainable urban development)
Even the one positive assertion comes with asterisks. The boomers oversaw a lengthy defunding of federal programs while wealth kept accumulating at the very top of this nation. So the resulting economic benefits haven't been all that useful to the rest of America.
Ofc, no individual bears the sin of an entire era. But we need to recognize the inherent selfishness of that era nevertheless.