I can explain the 9/11 no touch'ems.
Most of publishing is in NYC, and
everyone there was effected by it.
I called one of my long-time editors that morning to see if she was okay. She's a hard-headed Irish gal, no nonsense, and tough as they come.
From her office window they were able to see the towers falling.
She and everyone else in the office were in tears.
You can bet that more than a few people in publishing had friends who were killed. That kind of grief doesn't go away. The scars are still in place and they still hurt.
I did a follow through on this, mentioning to my agent --in general terms!-- about hearing of a writer trying to sell a possible romance with 9/11 as part of the background.
She went silent, then made that "oh" sound that is indicative of an internal wince.
For her personal experience, she was out of touch with her husband and toddler that day for a solid 5 hours, which was how long it took for them to reach her. She dang near had a meltdown not knowing if they were all right.
One of my collaborators on a series--his oldest son and daughter-in-law were flying home when the order came for everything to get out of the sky. My friend also had a near-meltdown, not knowing what plane they were on, only that it was the same airline as the one that the passengers fought back. The sweetest voice he's ever heard was his kid phoning him from an airport in the middle of nowhere, shaken, but okay.
Just so you know why it's gonna be a hard-sell.