Why we store images used with forum ask at two different locations

Question

I am just trying to understand the logics that 'why we store images used with forum ask at two different locations?'

Let's inspect something to learn not to disclose. Look at image.






Look at the site URL and inspected image URL, both are at two different locations. The same inspection you can try with articles, this has no such differences..good. But why with Forum. 

What's the reason, guys?

As I guessed:-

(i) Forum post is not as important like articles, good.
(ii) Editor has no such feature to upload the image directly inside generated folder and .aspx page instead of uploading image in username/uploadedfiles. 
(iii) if (ii) point is correct then, uploadedfiles named directory is deadline point for my entire forum activity. how heavy?


Main thoda saki aadmi hu na!! (the man who never believe).....ha ha