So, unless they can reduce the harm they cause to 0%, any and all attempts to reduce it are futile and pointless? This is the nirvana fallacy, and I hope you understand how horrible that would be if we lived by that rule. For example, I can't stop all racism, all human exploitation, all sexism because I live in a capitalistic hellscape built on the suffering of others. Therefore, I don't actually need to try, correct?