I don't understand why TikTok apologizes for this.

Personally, I am using TikTok to relax my mind and free my thoughts. I don't want to see any abuse, harm, violence etc. If I wanted, I would just watch news or something else.

For me, one purpose of TikTok is to get in a bubble for some time where there real world and all the bad problems don't exist. A bubble does not have to be bad if you are using it on purpose.

If this is considered as a feature for TikTok, it is only logical to hide abusive/violent content. Free speech for some political/religious group has lower priorities than keeping users in the bubble. I think this is totally legit. TikTok serves entertainment, not free speech or political discussions.