Then your pass at manually creating a Facebook account as an hour long side job presenting as evidence completely sidesteps the fact that it’s not remotely the equivalent of Russian state level resources, nor is it even remotely close to just Facebook properties with their levels of inauthenticity countering. Cue X, 4chan, French politicians, YouTube, indy sites like ZeroHedge, etc.
Then your ridiculous handwave of “fake” typical of uneducated retorts to experts whose entire job and training is analyzing, determining, and reporting these issues. Ya, I remember these asinine arguments well when people like you were on HN deriding the Guccifer 2.0 DNC hack as having no evidence it was the Russian state. No surprise how that turned out. They were wrong, Guccifer 2.0 was Russia duh.
Try to create a fake Facebook account. If it is not shutdown in a day or two, try to gain a significant following. Then try posting information favorable to Russia or China and test how many people actually receive it through the Facebook filters. Now try scaling this by creating many fake accounts. I can tell you with high certainty, that you and even a small army of people will not be able to reach many people or have much persuasion influence.
The second problem here is attribution. The claim is that these were Russian or Chinese accounts. Any of us savy with the internet know how easy it is to proxy our traffic through foreign IP addresses and leave the right fingerprints. If Russian or Chinese state actors created these accounts, you would have no way of knowing who or where they are.
As we saw in the Hamilton 68 hoax, the accounts that were banned were mostly Americans with dissident views rather than Russians.