To be fair, the right way to use the #fediverse seems to be to block/mute content you do not wish to see.
If Leftism is irrelevant to her, then she should mute/block those accounts that promote it.
Same way I just muted 8,192 accounts which are shilling blogs, containers, podcasts, python, ruby, rust, haskell, go, Apple, and other irrelevant stuff.