Yea the "she's not the president" angle is strange
Presumably these are democratic voters pulling this stunt, why would they go to Trump events?
It's like getting mad if a black organization doesn't go to Trump for reparations

. It's a waste of time and would likely get twisted by republicans in a bad faith manner (ie: Ice Cube platinum plan, opportunity zones, etc)
You push the party you vote for in the direction you want them to go
And they don't need to be in power, people always complain that voters don't get politically engaged until election season now a group is keeping that energy years before an general election and nikkas still got a problem with it

Democrats are being constantly reminded that a large portion of their electorate cares about this issue.