Everyone Check your Female 7 pin connector.....

NRA, you’re right, the 7 pin round is better quality, but unless one only uses their “own” trailers or carrys adapters, literally everything else with light duty trucks and trailers is the 7 pin flat.
It’s a trailer plug and not a philosophical discussion IMO. It is what it is. And really, most failures are caused by physical damage to the plugs, not “wearing out.”