WillowRun 6-3
In both cases there is a process by which concerns can be vetted. The vetting includes regulatory agencies or their designates. Presumably there was not enough validate concern with the B737 to overturn the certification of the Max.
Yet there is a concern for the possible application of rules to the A321.
It is not clear whether your arguments are against, the process or the judgements offered or in the application of the judgements to the process.
Did Airbus file any concerns over the Max and what specifically were or how were they disposed of in the certification process?
This board might consider if there are any flaws regarding either the max or A321 regulatory function and how they should be addressed