Most of us don't see the animals quality of life being effected.
Given how many people in the other thread thought culling spiders is something people do, I have to say something here.
Even if I was to blindly believe the cases of non eating spiders, that accounts for a small fraction of a percentage. I bet significantly more animals pass due to keeper inexperience than anything to do with near mythical non eating spiders.
The only first hand account of a non eating spider I could find was from an inexperienced breeder. Some how breeders can produce thousands of spiders without any eating issues but this guy's first clutch is the one that has the mythical non eater? You can guess what I think is to blame.
Just something to think about when you spread rumors like that.