Thank you for answering, Gail. My issue is that it's stupid.
I want to be able to send images and not put the burden on the receiver to have to manually download their images.
Most people equate their texts to email. I depend on going back in my emails years or even decades to find an image someone sent me. What if I needed an image from a 32 days ago only to discover that it no longer exists because I didn't remember to download it? What if I sent a client an important photo and they tell me they don't have it because the link to the image no longer exists?
I also don't like to have to manually remember to save every image to my local album. If I scroll a couple months backwards through my message thread to reference a photo, I want to be sure it's going to be there -- in the context of the conversation. Users should possess the ability to turn link sharing off.