> it's fine to not care for insects
Well no it's not exactly 'fine'. Maybe we will figure out some day that insects are a little bit conscious and it may turn out we have collectively been literally worse than Hitler for not caring.
In the meantime I choose not to care, not as a fully logical decision, but for my own sanity and well-being. I'm a dumb ape who tries (and even maybe succeeds) to be logical sometimes, my moral 'system' is a hodge-podge of intuition, rule-based and consequentialist thinking, I don't claim I have found a fully logical moral system.
> it's fine to not care for insects because there are a lot of them, and because their lives are short and brutal.
No no no, I'm saying, if you care at all, you should care about all of them, because as a rule their lives are short and brutal.
It's not like with humans where a lot of us have ok lives, so you can focus on the ones that have a bad time. Pretty much all insects have a bad time (if they are 'having a time' at all, i.e. if they are conscious).
I'm saying I reject caring about any one insect because it very probably leads to a repugnant conclusion (that I should care about insects above all else), based on utilitarian math -- unless you choose very very carefully how much you care about each insect.
I understand most people only care about local things. I think that's a moral failing, ideally I want to care just as much about people far away than about local people. I don't in practice but I try (I do donate to charities that help people in poor countries far from home.)
If I follow that logic and extend my caring to insects, I should care about all insects.
> I think you're making the argument "either you HAVE to care about every fly or you CANNOT care about any flies." Perhaps that logic works for you, but I think it's a fallacy
That's not my argument, that's my conclusion, based on utilitarian math, and I'm making a probabilistic argument, not a deductive logic argument, so calling it a fallacy is a type error on two counts.
> I also adhere to non-interference. If a fly is caught in a spider web, I will leave it.
What's the logic behind that? If a child stumbles into a pond and drowns, or is mauled by a wild coyote, will you let them die on the basis of non-interference?