Hi!
This isn't a he said, she said https://en.wiktionary.org/wiki/he_said,_she_said type of issue, it's based on evidence that is public and difficult (if not impossible) to delete.
In this particular case, it was based on a comment that was deleted. And of course most content in our technical spaces (those managed by WMF, not sure about Github and such) is deletable by admins.
If you feel that you would have to defend your behavior, perhaps the behavior ought to be self-examined.
This sounds suspiciously like "if you did nothing wrong, you have nothing to hide". Which I hope everybody knows is not how it works - after all, that's why we have our privacy policies - so I assume it was not the intended meaning. We can have disagreement, and we can make mistakes, and this is why good process is important. Saying "if you're worried about good process, maybe it's because you're guilty" - that's how this comment sounded to me - is not right.