From a business standpoint, Ned still messed up.
In their business (content creating), Ned decided to brand himself as the Married Man of the Try Guys. He championed his marriage, his wife, and his children in front of the world. We were led to believe and share his very public values of monogamy and his very White Picket Fence dream life.
By cheating on his wife, Ned tarnished his brand. We can no longer believe him when he takes a stand for his marriage, and he didn’t have much else to fall back on in terms of his branding. Sure, Ned was also "the athletic one" of the Try Guys, but that aspect of his brand wasn’t as fully cemented by us, the consumer, to hold any meaningful weight, especially not enough to overlook his primary title of Married Man.
To put it in perspective, and it’s not a perfect comparison, so bear with me: Remember when IHOP, the International House of Pancakes, tried to rebrand and become IHOB, the International House of Burgers? Well if you hadn’t, know that it was not received well by the masses. Everyone questioned them, telling them they should’ve stuck to what they know best, which to the public was pancakes and breakfast—not burgers. Eventually, IHOB made the change back to IHOP and all was well in the world again.
In Ned’s case, he couldn’t return to his status as the Married Man because his reputation for that was too far gone. Strictly from a business point of view, Ned had lost his worth in the company. No one was buying what Ned was selling anymore, it was a hard stop. It made sense that the Try Guys decided to cut their losses and not try to save that sinking ship.
So, yes, I can indeed imagine being fired for cheating on my wife, especially when my entire career actually revolved around having an honest and healthy relationship with her.