I see you have trust_level_0 and trust_level_1 so you are Trust Level 1.
See also The Ultimate Forum Guide (Codes, Trust Levels, FAQ)
On the more general points people are making, Blizzard appear to have taken Discourse’s standard Trust Level criteria with no (or very little?) changes of their own, so unlike Pathfinder, we can’t exactly blame them for thinking it up.
On the even broader point, there will be some times when an embedded image in a post will be a useful addition. I think those times will be few, though. And I’m quite happy with links that people can see, copy and Open URL for themselves.