Why do I need faf-uid if I am linked to Steam?

[nrook]

I am trying to get FAF working on a Mac* and was running the regular Python client. I was surprised to see I needed to run faf-uid. From what I understand faf-uid tries to get a unique ID of your computer so multiple accounts can't run from the same machine, as an anti-smurf tool. But my FAF account is linked to my Steam ID, so that already prevents me from smurfing.

Is there some reason it is still required?

* I am not asking for help on this, I know it isn't supported