Would you be opposed to SE implementing a program to scan for addons/parsers?

[Iyrnthota]

it provides a clear performance benefit.

This statement seems at odds with your previous position that parsing doesn't really provide any performance improvement

If you actually become familiar with your job instead of parses, you can see how close you are to the limit by how fluent your rotation is. It's all based on ilvl beyond that, so you're not actually increasing in skill. Just perceived skill because the number is going up with your gear upgrades.

Parses do not really give you good information. Knowing what you are doing does. If you need external metrics to measure your performance, maybe you should just practice your rotation better.

In my disgustingly humble opinion, some rules are alright to be broken. I don't really subscribe to the kind of moralistic absolutism that rules must always be followed. Especially when the stakes are so low.

In the hypothetical situation that I were to parse my runs, said nothing of it, and just used it to improve, who would that harm?

Squenix? They're still getting my money, I'm active on their game. What do they lose?
Other players? If anything it benefits, as I'm a better teammate for it.