I am 99% certain your right !
The limited time made a legal challenge nigh on impossible and without the full force of the state actively investigating each claim, to the same extent of the earlier conspiracy theory of Russiagate, the odds of overturning the election were very slim and needed somebody inside the DNC to blow the whistle.
As such a push for expediency and desire to just move on, has been the paramount goal. The SCOTUS will almost certainly hesitate to open Pandora's box, but the process is good for democracy and whatever shenanigans have occurred, it will make it far harder to pull this off again, as even the establishment won't want another drawn out post election argument.
One thing is certain in my book. Unlike Russiagate, I think there is something to this story and I will predict that over the next four years somebody inside the DNC machine, will not receive the necessary loot and get disgruntled enough to approach the Republican Party, or right leaning media.
In the ‘watching a puppy trying to figure out how to push open a door’ way.