I see what you're saying with the first part of your argument and it's good the subject at least crosses your mind, but for my moral framework, it isn't solely about utilitarian ethics. I don't think happy animals should be killed for the same reason I don't think humans should be killed in their sleep. You may bring up that humans have ideas for the future and such, but do babies? Why then is it wrong to kill babies? Because they will be more conscious in the future, perhaps. How about the severely mentally disabled than? Right here we see an argument from marginal cases. Severely mentally disabled somehow have rights but the other animals don't.
Now with the second part of your first paragraph, I think that's more about you acting on your ethical principles, which you really aren't. You admit that you are supporting sup optimal lives, which confuses me. Do you not have the will to act? Maybe you're just fearful of change. You admit switching on and off would be slow. Why not just full switch, or at least try it?
I think many here make the false assumption that a vegan life is less enjoyable.
As for the second paragraph, I think this gets into an argument about abortion as well. The best position I've come up with for all of that is that beings that aren't conscious aren't worth anything, but as soon as they become conscious they are worth something even if they go unconscious afterward. This position isn't perfect, but any other position leads to extremely absurd conclusions.
Thanks for a more in depth response btw!
How about the severely mentally disabled
If it's severe enough, I think this is a cultural question that could go either way, not an categorical evil. There are probably relatively good places in the Moral Landscape where this kind of thing is allowed. In the current culture, it would violate important Schelling points about not killing humans and such. Other things would have to change to protect against potential abuse, before this can be allowed.
If it's worth saying, but not worth its own post, then it goes here.
Notes for future OT posters:
1. Please add the 'open_thread' tag.
2. Check if there is an active Open Thread before posting a new one. (Immediately before; refresh the list-of-threads page before posting.)
3. Open Threads should start on Monday, and end on Sunday.
4. Unflag the two options "Notify me of new top level comments on this article" and "