I have the absolute opposite take. Facebook/Instagram were good tools for staying in touch with friends and sharing photos with them. Then TikTok came on the scene, and it was much less about connecting with friends as it was seeing short form entertainment. I view TikTok as much closer to YouTube than I do Instagram.
So FB tried to chase TikTok, and ended up (a) making it much harder to follow and connect with your actual friends, and (b) ended up with a shittier version of TikTok.