I wouldn't say that there aren't people who want theatrical edition. In fact, I'm one of the people who WOULD want the theatrical edition.
I sure would have liked the Theatrical Edition on DVD but it just didn't happen for the same reason as the Director's Cut not being on Blu ray... $$$ There are many people who would prefer BOTH versions on Blu ray with the possibility of the ABC edit that was the standard TMP for many years.
Fact of the matter is that Gordon's right. NONE of the Star Trek series prior to Enterprise were made for HD. TOS was easier to pump out as HD since it was originally shot on 35mm (live-action sequences; not sure they didn't use 16mm for the stock model shots since there is extensive scratching on them) and reels of the finished TOS episodes still exist. Getting that on Blu ray to coincide with the 2009 film was not as difficult as redoing TNG, DS9, and Voyager. If anything, I'd wager The Original Series is more popular now because of the '09 film and the Blu ray sets than it has been for years. There are more kids, teens, and college-age students who will watch the show now with the redone FX than they would have with the original worn-out, good for the 60's but not-so-great-now original sequences.
Before the Remastered episodes hit TV, there were very few places to watch Trek other than early morning on Nickelodeon's TV Land (which is the last place I saw the original broadcast versions aired). After the Remastered's hit more local network affiliate stations, the ratings were not half bad from what I've heard -- at least initially.
I love the Blu ray sets because they kept the original broadcast versions of the TOS episodes in addition the Remastered versions.
The other shows will have to be redone working with the SD edits. ALL the effects will have to be done in Hi-Res and that will be harder and a lot more expensive since those series have far more episodes than TOS. The live-action was still shot on theater-grade film but again the effects were done for the pre-HD era.... Frankly, so was Trek. There are still things that look garish on Trek. Most people aren't aware TOS was among the first TV series designed specifically for full-color TV which didn't really catch on until the late 1960s. Of course, some people like me prefer it the way it is. It's sort of like Technicolor used to be... Very vibrant colors, dreamy, more fantastic. Everything is done so true-to-life now that it's off-putting and at times depressing. The color in TOS definitely helped set that series apart as the most optimistic and dreamy part of the Franchise.
Frankly, I don't think we're more than 2-3 years from seeing TNG show up on Blu ray. There have already been Hi-Res tests done with at least the pilot episode. Also, it wouldn't be entirely out-of-the question to see another Blu ray edition of TMP show up in the future. Other than Star Trek II, there is very little reason to get the other movies on Blu rays. There's extensive dirt, scratches, and unstable film (mainly in the credits) on the TOS films. They all desperately need restoration and clean-up... A lot more TLC than Viacom/Paramount has show in years.
Wise got his Director's Cut only because he was respected and still a big shot in Hollywood when he asked for it. Paramount also saw that it was next-to-impossible that the DC wouldn't sell, either.
Paramount's been very frugal with Trek over the years. Part of it has to do with TMP and the fact that its production costs got out of control. Sure, there was a TV series that didn't happen that got charged to the film budget along with $3-5million of unusable special effects but it's also probably the case that Gene Roddenberry was out of his depth trying to executive-produce the film. Abrams' Trek was by far the largest-budgeted Trek film since the original... You have to account for inflation which most fans don't. Also, like TMP, the sets had to created for that film. The earlier Trek films were generally able to be produced on the cheap because of the reusable sets and models. To produce TMP now -- from scratch -- would probably cost on the order of at least $120-$140million dollars so Abrams' Trek wasn't that unreasonably expensive considering... I just wish the designs were better in that film!