I think it's the philosophy of "let him suffer" vs "put the dog out of his misery".
The injuries to the team crippled Allen, and yet injuries aren't an excuse. Acknowledging this, Loomis wanted to allow a prideful Allen to cross the finish line, even if on crutches and knowing he wouldn't be returning as the HC of New Orleans in 2025, but with his chin up. For some, it's an honorable death.
Others however believe that a more honorable death is a quick severing of ties and Loomis was overpowered and forced to go against his code of ethic (stressing that one or the other isn't wrong or right)
You can't satisfy both camps at the same time and the #'s always win.