If I have $100,000 USD equivalent in yuan in a Chinese bank account and try to have it transferred overseas in one go, they will certainly ask me questions. Similarly if I suddenly try to withdraw that amount in cash, I will be queried as well.
Ergo, as long as limits and thresholds exist, the banking systems are equivalent, and all we are left to quibble over is the what (or how much) and the why.
You simply can't do that, Yuan is nowhere near a freely convertible currency, it's a fundamental difference.
Once foreign money enters China, it's very hard to get it out, the CCP has a ministry dedicated to the control of it. Most of the people don't have the need for it.
What you are saying is irrelevant to Ant and banks in general. Ant doesn't care about foreign markets or your dollars, it's a Yuan-only payment tool operates inside mainland China for Chinese people, simple as that.
Ergo, as long as limits and thresholds exist, the banking systems are equivalent, and all we are left to quibble over is the what (or how much) and the why.