That's incorrect. Under MMA judging criteria there is a section called "Fighting area control" which states: "FAC is assessed by who is determining the pace, place and position of the fight." Although it does state that this is implemented rarely, it is most definitely a factor. In reality, it's almost certainly implemented in every fight considering it's almost a miracle for a past or present fighter to win a decision off their back (unless you're Bas Rutten).
Takedowns do matter regardless as to whether they're giving out damage. "It shall be noted that a successful takedown is not merely a changing of position, but the establishment of an attack from the use of the takedown".
These "specific" rules and wording aside, everybody knows that takedowns score relatively well in MMA and they are clearly seen as significant moments in close fights.
In regards to your comments about damage, seen as damage is evidently so important, I did more damage throughout the fight. I'm pretty sure I can even get a screenshot of the post fight stamina/health display. My point is that I basically had a close, 6 minute striking battle with a guy who maybe landed 15 significant or "more damaging shots" over the course of three rounds, whilst 9 of those 15 minutes were spent with me on top, landing a lot more strikes, doing more damage, mounting and gaining other dominant positions multiple times trying to finish the fight and completing 7 takedowns. I was never rocked or knocked down etc.
As someone who has watched probably 1000+ Individual fights, I can confidently say that if that was a real MMA / UFC fight, there is absolutely no way in any parallel universe that I would've gotten the loss on the judges score cards, regardless of what the rules state. I am a critical thinker. I am not being biased towards myself because I'm bummed out that I lost. I've assessed the fight in regards to exactly what happened. I was dominant. If that was real MMA, it would almost certainly be considered the worst decision in the history of MMA (ok maybe after Fedor's "win" over Maldonaldo haha).