There is a bit of an element of the star power being more than the achievement, you feel. It's a bit reminiscent of Wu Yanni blatantly false starting the Asian Games 100m hurdles, only for the organisers to also disqualify Jyothi Yarraji, as her reaction times were too fast, despite that they were clearly influenced by Wu's false start next to her. "Not being able to identify who the false starter was" (Wu contested that Yarraji had baulked, causing her to move), the organisers allowed both to run under protest, before disqualifying Wu later.
Lin Yuwei won the race and China did a 1-2, only for Wu to inevitably be disqualified later because of her earlier false start. But Wu is by far the bigger star of the two both on and off the track, and disqualifying her before she got to run would have been far worse for business, so a lot of people viewed the whole chain of events as the jury trying to figure out a way that they could let Wu run even though they knew she would be disqualified after, because the false start was too clear to justify a run under protest in normal circumstances.
I also think that if anything shady was going on in terms of athletes having been paid off not as pacemakers but to throw the race, they wouldn't have done it as blatantly as they did, going full 2002 Austrian Grand Prix. Even if somebody decided to expose the fix in the manner of Barrichello then, you'd expect it wouldn't have been all of them that did so, it would only take one of them waving He through to generate a controversy, and it would require all of them to be on board with it. If they were paid to compete but to ensure He won, they would have likely fought over 2nd place behind him. This, to me, lends credibility to the argument that they were there as pacemakers but were registered as official competitors - probably because they were expected to help pace all the way, rather than stepping off after doing their job at a requested tempo like we see at the Diamond League and the Continental Tour, where the pacemakers' job is akin to that of the derny in a keirin.