I'm a biologist and farmer. Biologists kill things.
Spiders don't really bother me. I live and let live. If I'm startled, I can be scared, but if I see it's a non-poisonous spider or snake or whatever, I not bothered. If a non-poisonous spider gets on me, I think: "Ah, how cute! I have a new friend." I feel sad when it leaves my shoulder.
Also, ladies, I provide spider removal or extermination services for you.
Anyway, much of my jobs as a biologist have involved some form of death. As a catfish farmer, I sent maybe 100,000 fish to their death every day. At the gardens, I was the primary exterminator for the 65 acres on display as well as the greenhouses. I'm probably killed billions of insects. I sprayed vast amounts of vegetation with a huge motorized spray rig. You think, "Oooooh, pretty flowers!" Well...
On my current job, predatory insects eat the baby fish when they first hatch. I kill predators. I kill fish disease organisms. To keep baby fish alive is very hard work. Some insects (air breathers) are killed by spreading diesel over the pond. Some other insects like dragonfly larvae are killed with pesticides. If you time it wrong, then the action with also either kill the baby fish or their food. Sometimes you have to do it anyway and pump food back from a different pond.
So getting back to the original issue, I guess I have a lot of Janist or Buddhist guilt, but I've been through "the change" where I can do whatever is necessary.