This seems like a bizarre conversation. Blaming people is about the divvying of moral burden. Blaming cows is about causal understanding, unless somehow you thought that discussing the moral responsiblities of cows was on the table.
Are you sure that 100% o people who seen this title will know that the article is talking in fact about humans, about our preferences eating cows and dairy, about our mega farms conveniently hidden of our sight, and not some wild creatures bringing havoc to the coastal areas?
I'm not so sure.
Yeah, humans are ultimately responsible, but not really for the reasons you listed.
The cows are gone, but it's not like we've left the vegetation alone for centuries to let it reach it's previous levels, and it's not like the marine life can spontaneously reappear after being wiped out. It's hard to restore a destroyed ecosystem.