This "we don't have to sacrifice anything" mentality is what held Trigun back imo
Vash should have learned that you can either save the butterfly OR the spider but you can't do both. This conflict is never resolved in the anime.
Tons of people die because Vash refuses to kill anyone, even if they're evil monsters, and he doesn't struggle with that nearly enough
RT: https://detroitriotcity.com/objects/4a92e1a6-7e76-4228-af62-7ddc70ac9e1d