Neither the person who contacted you was a real user of that instance, nor their "concern" was legitimate.
Congrats. You got successfully manipulated. And opened yourself up for further future manipulations.
Yeah, I personally don't care about images.
I don't want to make assumptions about what kind of images you post, but I actively block all meme/humor communities anyway.
Images are not text-searchable anyway.
So, all in all, for me, deleting image posts is not that big of a deal.
Thanking for taking the time to read the post and engaging meaningfully.
The perceived condescension was a deliberate addition by my humble self to make sure this post will be suitable for this community, which may not have been necessary after all.
I managed to post something actually unpopular here, and for that at least, I'm glad.
The instance in question was practically dead before this stupid thread gave it attention.
I'll bet you money that concerned user didn't exist 3 day ago.
Instance admins should learn how to be smarter, and not give manipulators small wins, alas, they will come back for bigger ones.