I respect that you have your own opinion, but the fact is, the snakes aren't bred in labs and then sold, like our rodents are.
They are snatched out of nature, and the people hunting them down are destroying habitat and other species, some of them rare as is.
The venom isn't used for anything, none of the big companies that buy and use venom have ever bought from round ups. That is just a ruse to put a "formal" stamp on a sideshow carnival about killing animals.
The way they are collected is also cruel. We do not flush rodents out of the wild, injure them, throw them into pits where many die from being crushed or die of injection, disease, starvation or dehydration. Only to kill the survivors in a carnival like setting.
To me, that just doesn't compare.
But again, to each their own opinion.