What a weird rule, do you know why it exists ?
Accessibility. A blind person (or someone who just can't see that well, or who wants to read it at a different font and sizing level) has the opportunity to read this in text form with a screen reader or with adjusted view settings. But those don't work with images (screen readers may if the image has alt text).
Ease of search. If someone wanted to find this post down the line, they are not able to search the actual text of the post because it's an image.
Quality. In all honesty, what is gained by this post being an image instead of text? What is the visual element adding that couldn't be accomplished with italics and bolding?
What should i have done to post this information then ?
Copy it and treat it as a quote in your written post (same place you put your source). You can add formatting to it if you want to emphasize parts.
Do you have any thoughts on this image?