It seems like it would be a knee-jerk overreaction to be, but Delta obviously has a lot of management issues and a shortsighted knee-jerk decision from them (or most giant corporations) would not surprise me.
And I guess even without the personal context, just common sense tells me that setting up a direct tranatlantic route and then keeping it going for as many years as they have should still communicate the profitability there, and that being told their plane with obvious safety issues isn't welcome isn't why they'd cancel the flight.
I guess to me it's just feels like a very US thing to think this. Like if you picture Ghana as some tiny African country it's obvious: you probably imagine it's just a small line item on Delta's balance sheet, duh big corporation doesn't care about your feels and will take their ball home...
But that's the only direct flight from the US to Ghana, direct flights from the US to West Africa are not common (afaik there's only one to Ghana and one to Nigeria) and they pretty much get to name their prices on the flight and keep demand (and knowing how much it costs me to visit home they very much do take advantage of that).