Exactly. It is the plural of MEDIUM, meaning a sort of conduit through which something else travels or flows. https://www.dictionary.com/browse/media?s=t News media are therefore the different routes through which information flow. In this case, even if some people use it as a singular, the plural should absolutely be accepted as correct, if not as the preferred translation. I had written "The media don't tell us the truth," which I reported as an answer that should be accepted as correct.
Media is both a countable and uncountable noun. This explains it well I think, https://www.eandvgroup.com/social-media-singular-or-plural/
I can't easily agree with the opinion under reference, but I may accept it. But what are we going to do with the word "police" - is it always in plural because it's not a countable word? But then, what about the Army and the Navy which are always in singular and - always in plural - the Marines?