Yes, there's some interesting papers post-fact on the ejecta but it was still dumb.
At the end of the day, the rocket did get off the pad. The repair was completed deluge system installed in less than 3 months.
The reason the deluge system was installed so quickly is exactly the reason you can't argue that 'they wanted to see if they could do without'. They knew a priori that it was necessary, that's why they'd basically already staged the hardware.
Installing a deluge system pre-launch would have cost them a month, a month that they wouldn't have spent afterwards, waiting for another round of sign-offs.
It was a dumb decision and posting fan-blogs like Teslarati isn't a good argument.
That said, I think you are right. Most of it comes down to how much someone cares about debris in the wetland and dust clouds.