You could get the same experience on Twitter by following Dora the Explorer, Procter and Gamble, your uncle, and Brian Chesky but you have chosen to have a specific experience in that app by curating your feed.
A better example, port LinkedIn's graph to Snapchat and it would seem like absolute nonsense.
IG ported a visual social graph to a text based app, this, by definition, isn't going to produce the most optimal experience. Thats 100% fine though, you'll realize who is good at posting text content, follow them, you'll unfollow the people that are not good, etc.
This is why TikTok was interesting in the first place because it removed the curation step and created an interest graph instead of a social one. What the poster is talking about is the friction inheirent to using a social graph as a proxy for an interest graph.
"I love when you talk about tech but I don't care at all about your dog."