By that description, the vast majority of people are evil. Well, both evil and good, since most people at least occasionally do things that aren’t in their self-interest to help others. But primarily evil, thanks to the inaction clause on the evil side and nothing comparable on the good side.

They’re also more evil the more educated they are, since they’re more aware of ways that people are suffering harm that they could potentially abate.

For example, if you are not homeless and you are aware that some people are homeless and a storm is coming, if you don’t help them all find shelter - to the extent of bringing them into your own home even if it means you end up not having a place to sleep - by your definition, you’re evil.

I’m not a fan of that definition, either for D&D or anything else, but if it works for your table, great!