The fact of the matter is how it's presented and how it's perceived. FB is centralized, so people had to rely on their authority when they reported the numbers of users on their platform. The steem blockchain is open and transparent to all, and as such, all but only the most gullible understand that the number of accounts vastly outnumbers the amount of actual users. The only problem is if people try to obfuscate and lie about the number of active steem users to the ignorant (false advertising). We have people like @penguinpablo and @paulag among others that do a great job of showing the true numbers of active users along with many other relevant statistics.

Bottom line is FB is the authority of FB, and the steem community is what represents the steem blockchain. If you see a someone spreading FUD about the number of active steem users, call them out about it and get rewarded. But trying to compare what happens to FB and saying it will happen to steem is comparing apples to oranges, and is FUD in itself.