But...that narrative doesn't exist, it's a strawman.
No one that attributes any significant impact on the election to the Russian information warfare operation limits their description of the operation to $100K in Facebook ads. The Facebook part of the operation involved ads designed (among other purposes) to draw audience to false-flag Pages, that then distributed non-ad propaganda which would be relayed by the followers of the group, who were dupes of the operation, including organizing meat-space events designed to foment conflict and draw conventional media attention. The $100K on ads wasn't the operation, it was an expenditure to recruit unwitting agents for the operation.
And that broader Facebook angle itself wasn't the whole operation, either, there was also the targeted hacking and information release aspect, as well as other channels through which influence was (or was attempted to be) exercised. Like the NRA.
You are technically correct. The $100k part of it is stripped out before the "Russian Facebook hacking to steal the election" is reported over and over in the media, absent of any details. And that is how the majority of the public is absolutely certain of something, even though almost none of them know any of the details.
There are unethical things discovered from the Clinton campaign in the wake of a spear phishing attack. How can I be more mad at the messenger than the people who did the unfavorable actions in the first place? Why should I believe a guy with "P@sswor0d" was hacked by Russian Intelligence vs any one of the other thousand people looking for credentials on this guy?