You could unfollow the people who spam you with unwanted posts. I find strictly chronological feeds to increase the control I have over what I see by not prioritizing the more popular posts of those I follow. It also makes it much easier to say “I’ve caught up to where I was last time, good time to stop scrolling”. (Parts of a website that center around discovering new content do need curation for the reason you mentioned, but content discovery is to me not the primary purpose of twitter style sites)
Chronological presentation is less useful for serving advertisements though, so I don’t expect it to show up very often.
I also do not understand the theory that the order of presentation is necessitated by advertising. Adverts are inserted into the 2nd position regardless of how the feed is ordered.
Chronological presentation is less useful for serving advertisements though, so I don’t expect it to show up very often.