Ahhh the troll defence.
Yes, yes, yes, I must be a troll because I don't agree with you. Good argument.
It could likewise be postulated that had they diverted, the workload for the controllers in placing two aircraft into traffic where it was not scheduled, filed or expected could have caused conflict with other traffic.
Postulated:
1.to claim; demand; require
2.to assume without proof to be true, real, or necessary, esp. as a basis for argument
3.to take as self-evident; assume
So if we divert the controller might be so busy he'll control us in to conflict with another aircraft. I don't want to be put in to conflict with another aircraft so it is safer to not divert.
Your quotes are not regulations.
Can you show me the procedure and regulation that allows you to land at a controlled airport without landing clearance. This was not an emergency. This was not a radio failure. There was no urgent need to land.
????? Still waiting.