ITT tankies pretend they don't know that legal arguments are meant for court and are made to argue from every angle.
No, this isn't an admission that the primaries were rigged. They weren't. It's a hypothetical argument meant to progress a legal case to summary judgment, where the lawyer argued that even if everything the plaintiff said was correct, the DNC would still win the case.
Essentially, what the lawyers for the Democrats were doing was "if I grant everything you claim for the sake of argument, you would still lose, and here's why." That doesn't admit anything. OP knows it, but since he's a literal Stalin-humping fascist who just wants to see anyone who wishes for a better world fail, he doesn't care.
The primaries weren't gerrymandered, that only applies to the US house general election.