That’s not really an idea way to manage it for most xwiki users.
xwiki has a really nice feature that allows you to upload and embed images easily. It’s really convenient.
If I have to manage it separately (dedicated page with related image attachments, then take the additional steps of linking to that image), it becomes a bit more time consuming and a bit more of a hassle.
Also, deleting and re-uploading is a problem if you actually care about the attachment history - in that rare case where you actually do have a history you care about.