Give it 1-2 hours of your time and I bet you'll change your opinion at least slightly. Your friends are just sharing content that you don't find interesting but there is a "X TikTok" for just about every topic no matter how niche. Everyone's TikTok is very different, you can have overlap in topics with friends but you can also have a highly personalized feed of stuff you like.
Edit: I say of this because I thought VERY similarly to you before I tried it.
Edit: I say of this because I thought VERY similarly to you before I tried it.