What the fuck is with this "muh environment" shit
There have been several mass extinctions before humans ever existed. What happened during each one? The environment changed each time, obviously, but it seems to me like you guys think the environment is just something that's always existed in this exact pristine state and humans are ruining it.
No, we aren't ruining it, in fact, we are the environment for the most part. Who gives a shit if backwards leaping frog tree turtle dropbears survive this environment? Every single environment in history has had winners and losers. If something we would prefer survives the environment is being threatened, we can either manipulate the environment to guarantee its survival, or we can get something else to fulfill that function. Granted, we can't do that for every possible thing, but eventually we will be able to.
If you value the life of an insect as much as the life of a person, what about the life of bacteria? They are living organisms as well. Do you realize how many of them you're killing every time you brush your teeth?
So let me put it in a way that you can understand. People matter to other people for the same reason that anything matters to anyone. Other people can be very useful. You know how to work metal and nothing else? Cool, joe knows how to farm and will trade you food for metalwork. If Joe dies, you no longer have food unless someone else knows how to farm or otherwise obtain food. Is Joe important? Not quite. The important part is the information he holds, which can mostly be used by any being with the faculties required to understand and use it. That is the most basic form of value that exists. Other than that, there is sentimental value, reproductive value, and other various forms of value.
Do you see what I'm getting at?