It’s just that simple...
I think you’re right in that the Republican “establishment” is all concerned with the fact that she’s not doing things the “right” way. She should learn more about foreign policy and spend the correct amount of time as a governor, then as a senator, etc. While the democrats place no such demands on their candidates. IOW, the pubs are “playing by the rules,” while the dems understand what you pointed out - those rules don’t matter anymore.
My guess is that Sarah’s purpose is to stir the grass roots opposition to this administration while there’s still time to do it. Will she be ushered into the presidency? Why not.