But if we are arguing if waste is justified then obviously it's not for you or me to decide if it is, including the humans from the future.

I'm just laughing at the inconsistency. If people were really consistent in their views of (un)justified waste, I just don't see the same uproar to those other magnitudes more wasteful things (like eating meat, spending a life playing video games etc.).

It's like being mad about one of the fastest functions in your code when there's many others to optimized.

I also do not want to talk about the philosophical side to taking a life of an ant (delve into what waste is justified or not, and which degrees of dopamine response would justify it).