Exactly. Lucasfilm "bowed to fan pressure", but deliberately did everything they could to bury those particular transfers in a shallow grave.

No effort was made whatsoever to give them even the basic respect that they deserved for those DVD transfers. It was clearly a "Here they are -- now bugger off and leave me alone" job.
Disney at least
appears to be exploring the possibility of releasing fully restored versions of the unmolested original trilogy on Blu Ray, although the word is that they're finding it hard to recover all the film elements, as once George assembled his SEs in the late 1990s, the original film negatives were effectively left to rot, as he was of the view at the time that the SEs represented 'restored' prints and they were to be used as the basis of all future releases.
I appreciate George's reasons, in particular his desire to try and tie the 1970s/1980s productions into the prequels (as pointless as that is -- they'll
always still look like 1970s and 1980s productions no matter how much CGI gets added to them.) But there
is a market for versions of those three original movies, without the future revisions. Some fans, heck some
film collectors, would like to have high quality versions of those movies simply for historical reasons. The SEs do not (and can never) provide that.
Wrapping back around to Star Trek, I'm not of the view that TWOK's Director's Cut is necessarily that much better than the theatrical, it just adds a few nice little moments that otherwise aren't missed in the theatrical cut. But TMP and TUC are different matters -- some of the changes made there fundamentally alter the movies, so I'm kind of glad that
both versions are available, if only from a purists standpoint.