> Do you know why text embedding wasn't included into HTML standard with a simple tag?
It probably occurred to people that copying the text would be easier. Also consider: There's no standard HTML way to put an image inside an image. And there's no standard HTML way to put text inside text. That seems reasonably symmetrical.
Also, directly linking to content from other sites (as opposed to providing links to other pages) is increasingly looked on as on the spectrum between undesirable and a copyright violation.
Links to other pages have always been acceptable. Displaying images on your own pages that are hosted elsewhere is pretty much unacceptable. Also, from a practical standpoint, you're better off copying the image -- assuming you have the right. I think the same reasoning should apply to text.