Alexandrians were not evil for the way how they used souls. They turned evil for FORCING LIVING BEINGS to be used for their technology/culture.
You ARE allowed to manipulate souls. Quickly gets into questionable ethics, but you know, not necessarily a bad thing. If you do it respectfully and honorably, you too can manipulate souls.
Pretty sure that there is also an ethical difference between having a soul be turned into a weapon, such as for a relic, which is still 'its own thing', so to speak. Or if you just... soak it up into your own soul, let it transform your physical body, and then discard it when used. There's a difference in value here, and in the amount of respect a soul is given. Pretty sure there's also a hint at the destructive nature of consumerism here.
Not really okay to force a soul into submissive gladiatorial combat for entertainment. Especially not after it turns out that doing so harms the combatants and they get sickies from it too. Kind of an indication that, whatever they're doing, is kinda bad™ for their Soul Health Bars. Where as we, with our magical soul weapons and armor, never really had an issue with the other souls eating away at us. So we likely did something right.
