Maybe, but ST09 came out years after there was any new Trek and on more screens, and still TMP sold more. TMP took Trek more seriously, and regardless what the pundits and executives say about it today, it was immensely popular.
But in 2009 we had a lot more content to watch than just 79 episode, plus a lot more other quality Sci-fi to explore. Plus I don't think the fandom in 2009 was quite as enthusiastic and die-hard as the one in 1979 (that's purely from my experience of being alive in 2009 and from what people tell about the Trek fandom in the 70s) It always sounds like in the 70s Trek had just gotten new life through re-runs and it seems like people were literally dying for more Trek, in 2009 Trek was comparatively dead and the big Sci-fi shows were things like NuBSG, Eureka and Lost.
Also the re-boot "back to the roots" approach might have deterred some people ("how dare they recast Shatner/Nimoy???" "Why isn't this about Picard, Seven or Janeway???" "This isn't exactly as I remember from my childhood!!" etc.)
As to TMP taking itself seriously... It's subjective but I can't see it. Especially with stuff like pretty much everything about Ilia (from her sex oath to her drone walking around in a tiny, tiny bathrobe for the rest of the film) or that endless flyby scene. What merit TMP might possibly have is copied from 2001.
I do have the suspicion that at least some people who claim that TMP is "taking itself serious", "intellectual" or "artistic" are just telling themselves that because it's Star Trek (especially ST with the OG crew) so they feel they have to talk it up/defend it, just like some people who insist that TFF isn't a crime against the very film it is shot at "if you look at it this way".
I still think if TMP had been the same movie, but hadn't carried the Star Trek name, it would have made a lot less.
That's not saying I find it impossible for people to like TMP (or even TFF). People like bad things all the time; I myself enjoy Haven. I know it's an teriible episode, but some elements of it just tickle my interest and I like 80s camp.