[ Unfortunately for you, Ratio stays his hand, if only because he can't be certain how divine natures work. If Yato was born from a wish to kill, is it limited to killing people, or can it be taken figuratively? ]

Depending on how broadly this wish defines killing, it may not be limited to a force of destruction. To kill is to end something, and an ending may be the precursor to a new beginning. Killing a failing project so you can start a new one. Killing a business that dumps cheap quality goods so a local company may have the chance to create and sell a better version. Or killing an opportunity for a malicious actor to introduce disinformation to a news network, thus preventing the start of a civil war, as a few examples.

Even if your ability to kill does not apply to concepts, there are all manner of beings whose deaths are beneficial. Bacteria and viruses, for instance. The ones that harm the body must be killed for our survival. Pests or invasive species. Cancer cells. Preparing food involves killing the flora and fauna we consume. Perhaps you could be a chef.

[ The last part is said teasingly, although it may still come off somewhat serious from Ratio. ]