I know there are like 5 trillion Instagram viewers. But I've never actually needed to use any of them because there is absolutely nothing so important on Instagram that I must see it. The entire site is optional.
My kids school puts some information that I need to see (not just "would like to see") on Instagram. Same with the sports team they play for.
I've complained to both about it but change is glacial. I'm lucky in that I know how to work around it, and I do my best to keep others who aren't so tech savvy updated about things they need to know but may have missed.
Irony is they moved most of this info from Twitter/X to Instagram.