I think the sentiment expressed in the OP is exactly why he decided to do this now. It didn't do anything material, not really no, but what it did do was skyrocket Booker's name as a possible replacement for the widely hated Schumer. People are begging for someone to replace Schumer, this is Booker throwing his hat into the ring.
Whether or not the Dems will learn the right lesson from all this remains to be seen...but given their track record, I hope you'd forgive me for being skeptical of that.
It is so deeply frustrating. This just tells me the Dems are continuing to learn the wrong lesson.
They're asking "why didn't anyone listen to us?" instead of "why didn't enough people vote for us despite listening to us?"
I voted for Kamala, because obviously, but they are continuing to underestimate how much people hate, despise, the Democratic establishment. Delusional old fucks.