I certainly value my life, why should other lives not be valued? I would not want harmful treatment to others of other species. Most won’t change from their ways to not contribute to such, I am aware. It is still what would be very well for all of us in general to do. We do not have to contribute to the misery and slaughter of many animals being used, we could be much healthier, and not contribute to more land, water and resources being used with greater waste left, as environments are worsened and many species go extinct with the contribution. I really found tasty meals with this way I have, to continue with, and have been doing very well with it for well over a decade.
Asking why people are like this without genuinely seeking to understand is just bemoaning the state of the world. The world is a place of unavoidable ignorance and suffering.
Most of us were nonvegan before becoming vegan. We know damn well why people choose to consume animal products. They’re wrapped up in their own suffering via capitalism and only want the familiarity and convenience of emotional comfort via food, after another stressful day at work.
If one can understand that most people are suffering from ignorance and have a hard time accessing their compassion, the one can relieve a lot of their angst at the world. Then, one can develop compassion for all who are suffering, human and nonhuman alike.