I disagree. The Like Button is a de facto feature to further exploit or empower the the role of the user for internet content. Its a democratic effect in reality.
And it serves several different purposes depending on context. Facebook like:
...is intended to give a measure of popularity. This tool was so popular that Youtube decided to adopt it for its own system. In March 2010 a redesign came and the five star system was made into "thumbs up". I quote:
At the same time, the look has been "dumbed down" some. For instance,
with the change, the five-star rating system is kaput. In its place
are thumbs up and thumbs down buttons. This is a change that means all
previous ratings are converted into "like" and "dislike" percentages.
These will replace the five-star rating view across the site, as well
as mobile devices, a change YouTube is making to its API. Though as
Frumar explained, most people would either rate videos with five stars
(meaning it was the best) or one star, and that very few were using
the two- to four-star ratings.
You can get more information about the history of the "awesome button" here and here. But an interesting fact is:
Facebook CEO Mark Zuckerberg spent a good portion of the noughties
giving the like button a thumbs down. According to Andrew Bosworth,
Vice President of Advertising and Pages at Facebook (and known simply
as "Boz") it took nearly two years to get the concept of an approval
button for posts off the ground.
In any case the very community (and mainly stack overflow) were we are now would not be as famous without its rating system (like/dislike; try to imagine it with a 5 star rating instead and consider the consequences).
As for Youtube the like system is not just about liking or disliking the quality of the video. It is also about voice. Some videos, particularly when it comes to political, ideological or religious issues tend to have high assistance of both likes and dislikes. This is an important and relevant feature of Youtube from my point of view (when you vote on news usually you mean something very specific).
The option to remove the dislike button has, however, been considered in the past and I quote a bit of this linked article:
While it’s interesting that the down vote option has been removed, I’m
curious to find out if it actually ever added any considerable value.
For me, the only benefit the dislike button had was that it allowed me
to quickly see if any video was high quality or official. Other than
that, it pretty much went hand-in-hand with the ridiculous, angry and
spammy comments that we’re accustomed to seeing on YouTube.
Sounds familiar? The article is from 2012 but both thumbs up and down still exist. Empowering the user is likely one of the most important features in UX and my advice is that you should not be quick to disconsider it.