Is the sub-account secure?

Many people may not know that the strongest and safest exchange, Binance, allows for sub-accounts, and ordinary users can have up to 5. This means that one Binance wallet can have 120 independent receiving addresses.
The operation is as follows:
Finally, consolidate to the main account @Yi He @币安广场 .
Efficiency is good, but most importantly, it is safety, safety, and safety.