This seems to be about the right take on Fallon’s retirement. What he did was wrong as a matter of general policy. You don’t undercut the President unless you’re under oath or otherwise compelled to give your opinion. You don’t lie, but it’s better to not offer your opinion in that case. (it’s why I’m skeptical of optimism from military leaders, by the way, on the efficacy of policy from the White House… they’re not supposed to voice displeasure)