I don't care if it's limited to images and JSON and the game internally checks it for validity before passing it to the script, we need access to internet to allow for a wider array of mods. I don't care if you route it through some stupid Microsoft proxy first, but we need this.
For example, i want to create a translating mod to help the people who arent so fluent in English (or vice versa). I cant realistically do that without using an external API. Or what if i want to make a mod that allows people to create an entity with the skin of a player from Minecraft: Java Edition. I would need to use the JSON API for that, wouldnt i.
After all this, i don't see why it cant be added? I think after all these checks it is finally safe enough for us to make a single HTTP request.