I mean, any GM who has done the job well enough to be a competitive hire is employed, right? In a position he can’t be hired out of? Not sure what veteran GM option could have been realistic, though I understand the idea.
People also forget that Harris isn’t a total noob. He was a minority share owner with the Steelers for a few years and sold his shares to buy Washington. Now to be fair that was during Pittsburgh’s lowlight era, but he still got his NFL sea legs under him observing how one of the most consistently professional franchises in the league operated, during a time of total stability for them. He wasn’t a total outsider and had spent some years making relationships with the other owners, which is how most future majority NFL owners do it (starting as a minority owner for a while)