You have your races mixed up, no one was touching Dani at Sepang, it was Valencia where Dani had pace at the end of the race to catch Marquez and Lorenzo. The debate is, did Marquez have the pace to go with Lorenzo at Sepang. I say no he didn't and there is no proof of any kind to suggest he did.
I was definitely talking about Valencia, as regards how it affected the final points standing leading to the championship.
No one will argue that Rossi was more deserving. (Well except the yellow smog nutcases) but that's immaterial.
I would argue that Dani had the potential to take first or second in that race. In the early stages of the race (despite riding on a full tank which is problematic for the midget) he was 4/10ths quicker than Lorenzo by the 4th lap. By the 6th lap he was gaining steadily.
Meanwhile MM spent the entire race rarely more than 3/10ths behind Lorenzo - never once trying to pass him.
With 9 laps to go, MM was lapping 2/10ths quicker than Lorenzo and then falling back showing clearly that he had the pace to pass Lorenzo.
With 8 laps to go Pedrosa really picked up the pace lapping 1/10 of a second quicker than Marquez.
With 7 laps to go Pedrosa closed the gap between him and MM by
8/10ths of a second. The logical thing for MM to do (in view of Pedrosa closing in like a missile) would be to get past Lorenzo and go for it. Instead... the little ...... sat on Lornezo's tail like a wingman creating a barrier to Pedrosa to keep him from passing. No-one with a capacity for critical judgement could deny that he was sandbagging. Marquez hadn't dueled with anyone and his tires were in good shape; Lorenzo's maybe not so much. MM had the skills and the faster bike but made not one attempt to pass Lorenzo.
With 2 circuits remaining Pedrosa was up close and personal lapping a full 7/10ths a second faster than Lorenzo and poised to take one of the two top spots on the podium.
If MM had done the job Honda was paying him to do, he'd have made (at the very least) some pantomime of trying to pass Lorenzo - but he just sat there glued to Lorenzo's back tire. The undeniable fact that both Honda riders were consistently able to lap faster than Lorenzo throughout the race is a clear indication that they were capable of passing Lorenzo and taking first and second on the podium.
Again... (and you Pov know me from years on this forum) know I've never been a Rossi supporter, so you know that I don't write this out of sour grapes, but only to contend that MM really threw the race out of childish spite.
Personally - I wouldn't have been overjoyed if Rossi had gained (notice I didn't say "won") the championship - but I'd have preferred to see Marquez fully utilize his skills and and state-of-the-art prototype bike to take the podium rather than to skew the results out of a sense of personal vendetta.