Why social media was right to remove dislikes

7 years ago I was thinking that the goal of removing dislikes by most major social networks was to get more interactions and “don't make people mad if they comment or post something”.

While it is still true, but it is much more adequate than having dislikes and karma system like Reddit has.

So on Reddit if you post some other opinion that people don't like you get very fast karma less than zero, and you can't comment anything. Which makes all discussions one-sided garbage.