It’s not so interesting. It’s just political machinations. Trump is not hiring whoever he’s hiring to lobby. He’s hiring political campaign staffers to represent him in the Byzantine GOP rules committee. Not to lobby the government.
By the OP’s new definition of a lobbyist, anybody who hires a lawyer for their campaign is hiring a lobbyist.
Trump’s hiring decisions aren’t what captures my interest. It is the clear double or triple standard applied against any candidate other than their favored one.
It’s as though they believe all observers are stupid. /rhetorical