That’s a great rundown with decent logic & examples behind each point.

I think the biggest point is the takeoff weight.

If the impact/evac/safety aspects can be addressed, the only way I can see it working is to add a “cattle class” that’s like $10 cheaper than current economy and has something like 40 “seats”.
Then increase the price of what is currently economy class by $10-20.
You lose $400 because of the new cheaper class, but gain $1,200 to $2,400 by increasing the price of economy (considering a 160 seat plane, and convert 40 seats to standing). So, net gain $800-2000. Let’s you advertise new cheaper fares, and the price increase isn’t hugely egregious when the 40 seats sell out instantly.
I guess it doesn’t work on less busy flights if only the 40 cheap seats sell