Having worked in media sales, it's interesting that people talk just about her followers and not how many of those are actually actively engaged with her media or actually affected by it.
Hard to quantify obviously, but just because you have 50k followers, doesn't mean they are seeing your posts on a regular basis or taking any action (buying product) based on those posts.
You see this with Brodie.
Sure he has millions of subs, but why do his disc golf videos only get 60,000 views then?
Active engagement is more important than raw numbers.
Your point is right in terms of passive vs. active engagement though I don't know if Brodie is a good example. He gets slightly more engagement on his videos than Eagle McMahon and pretty much the same amount as Simon Lizotte. AKA better social media engagement than anyone other than Paul McBeth.