SR, MMR, and Role Queue

You keep linking things, but have you actually read them?
Call me dumb if you like… maybe I am, or I am confused or something, but I already see an issue with this supposed explanation of how the system is supposed to play out when it comes to personal performance.

So let’s say I one-trick. Say I’m at 2000 current rating (which is SR, why current rating is called Skill Rating is beyond me).

Say the system already estimates me capable of reaching ~2250SR (that estimation is the MMR), because of how I performed in recent matches (and yes, this is possible, the way it was possible in WoW. I don’t care what actual numbers they use for programming purposes, they can correspond to a certain rating and can be translated and shown in a 4 digit number).

To reach 2250 SR, I need to keep winning. Win at least half my games if they take place on 2250MMR, win more than half my games if they take place lower. That’s all good and well.

But as to my performance, shouldn’t my performance be measured compared to people at my current rating (SR) and not my MMR? Because MMR is already an estimation of where I belong.
The way this is phrased, in order for me to get to where I’m supposed to be according to the system, I have to perform not better than where I am currently, but I have to perform even better than where I am estimated of capable of being.

If that’s the case, this would be truly ridiculous.