I feel this limitation does annoy you when you want to quickly add an attachment like a screenshot of a payment info or a pdf of your new virtual id and you have to go through this extra step to make it work.
This feature would actually allow users to use their 1gb of storage more effectively.
Maybe we could have a separate item type called Attachments to store anything by just clicking the upload/capture button to save attachments instead of having to create an entry for it first.
An advance request related to this is Use mobile phone camera to add a picture as attachment which would be of a great help to save important pictures/documents on the go.