They are removing dislikes because dislikes bring negativity to the YouTube space. Imagine what getting dislikes feels like when you have put your heart into a video. People expressing their disapproval without a qualifying comment is not constructive.
Then you can choose to disable public vote visibility. That's been available to uploaders for years. Of course, channels that produce good content generally don't do that, because their vote ratios are evidence of their quality.
