(a) Coca Cola employs many thousands of marketing people who must, to justify their salary, come up with venues to feature the Coke brand.

(b) Mass marketing is notoriously terrible with metrics, so it's not an extraordinary claim to suggest that maybe Coke is investing in some marketing that doesn't much help it.

(c) Coke's business model has as much to do with its distribution system --- the fact that they can get a Coke into the hands of virtually any person on the planet in minutes --- as it does with its brand.

(d) Copyrights and trademarks mean that motion pictures need to acquire the rights to feature many (in a Spielberg film, perhaps all) of the brands shown on screen, which creates a venue in which major brands like Coke are consulted as a matter of course simply because either they or their competitors need to be shown simply to create verisimilitude.

My biggest argument against media consolidation, though, is that I simply don't trust any one entity with significant centralized power. While Disney+Lucasfilm is probably a pretty good fit for business and entertainment reasons, the sheer size of the various conglomerates is astounding.

And don't think for a minute that there isn't blatant propaganda in some TV shows, even if the propaganda isn't coherent within a single media conglomerate. The example I found most bothersome was the justly canceled TV series "V", which had extremely overt xenophobic allusions to issues of the day, like illegal immigration and foreign policy.