You may not realize the ability to produce goods and services individually increases the value of their production to the individual producers, but that profitability exists anyway. Making your own doorknob or spoon greatly increases the profitability of your productive work over selling your labor for wages that are parasitized, so that you can purchase a thing manufactured by another whose labor was similarly parasitized, via a transaction that is also parasitized. As the abilities to produce goods and services become increasingly independent of institutional parasitism, actual freedom is the result, and none of this depends on theft from others. In fact, you can see that it directly decreases multiple vectors by which theft is committed.

Facial recognition is already being deployed and used to harm individuals today by institutions, and individuals deploying it themselves doesn't increase in any way the harm to them institutions commit with it. Instead it enables individuals to voluntarily cooperate against institutions that seek to harm them via covert means. Big Brother already uses this, and individuals not using it only increases the value of it to Big Brother. Only by using it themselves can individuals increase their power, as that delivers it's benefits to them, rather than leaving that power limited to their enemy.

Steem isn't very decentralized, since the tokens are concentrated, and that concentrates power. If it fails to decentralize, it will be outcompeted, as individuals will increase their benefit - profit - from their participation in social media, and every other endeavor will similarly compete or die.

While decentralized facial recognition incurs a cost, that individuals are more held to account for their actions, which is what is angering you, it provides far more valuable benefits by also holding institutions and other individuals to account for their predatory and criminal acts. Even if your sister becomes unable to be a camgirl as a result of this technology, in actual financial terms I believe that broad adoption of facial recognition technology will profit her eventually by decreasing the criminal harm not only to her, but to her family, community, and nation.

It may be difficult to grasp these less obvious benefits, especially when you're angry about negative impacts happening to you, but they are real anyway.