Actually, even eating fruit and nuts you have to be careful that you plant the seeds properly afterwards. After all, in the case of fruit, you,ve just deprived the seeds of their natural and best food. Tut tut. And nuts are seeds. Oh dear oh dear oh dear. Really, if one values life, one shouldn't eat anything at all because all food is a form of life.
In anticipation of objectiions that animals have feelings and plants don't, I wish to mention that it has been discovered recently that plants have communication systems.
sel . As you say, that option isn't available to everyone.
I agree wholeheartedly with there being compassion in world farming, but for all the bad stuff about modern farming, they proportion of human beings starving has fallen in modern times. Like most big issues, it's not a case of one approach being right and another being wrong. We can each only do what we think best to keep improving things in the world.