If optimizing an internal tool can raise profits by 20%, I don't understand your disagreement. The comment you're replying to mentioned profits vs. unnoticed efficiency, not internal tools vs. consumer-facing software.

If it makes a big impact, it makes a big impact.

> If you're great at optimizing SQL, probably just doing that in any place you can get your hands on will make a pretty big impact.

This seems like an argument that there are no priorities and no things that are more important than other things. I don't think you believe that.