Fiduciary duty does not mean "must make money at the expense of all other considerations".

fiduciary duty means sometimes not to burn all your bridges. Politics aside, Trump Inc. is blackballed by all but one or two banks due to such tactics.

Edit: And this is not $500 BILLION so you can say, F it, boom or bust, let's try it. The upside isn't that much, relatively speaking, considering the blacklisting downside. Even if Revlon doesn't pay, a large % is already banked or will be in bankruptcy proceedings so it's not a 100% loss.