From the article:
> We’ve also heard directly from smaller creators, and those just getting started with their YouTube channel, that they are unfairly targeted by dislike attacks. Our experiment data confirmed that this behavior does occur at a higher proportion on smaller channels.
People who are just getting started on YouTube tend to have poor production quality and editing skills compared to established channels. That might have been acceptable in YouTube's early days when there were no standards, but now we're at a point where we've all seen thousands of videos on YouTube, and we all collectively expect high quality content.
Seems quite natural that smaller channels that are just getting started by people who are still learning will be disliked more often than large channels. Hardly a valid reason to eliminate the dislike button.