It's all pretty suspect, but with game previews there's a lot more "controlled" aspects to it. With movies and tv shows, you can watch it at home on your computer and make your own conclusions and most articles about these things are subjective and usually state facts like when the movie is coming out, who stars, etc. With games, we have no access other than videos carefully curated. Sometimes we get to see a journalist play through the game. But it's all so fake and careful and smoke and mirrors.
It's not just a games issue for sure, but that's not an excuse.
There's an embargo up on Thursday afternoon (GMT) for Paragon - happy to talk about that event after that time but I can assure you it wasn't much like the events you're thinking of.
And game previews can absolutely be subjective - release date, cost, microtransactions, DLC, player count, systems etc without offering comment on whether they "like it" or not.