Every topic has nuance.

Every. Single. Topic.

There is even nuance when talking about nazis. Like the fact that they rose to power by giving people economic solutions prior to speed running pure evil. That doesn't anything that they did was good, because the nuance is in how they implemented those economic actions. The small details that made it work so they could rise to power at that point point time in that location.

Nuance doesn't mean good or evil, just complexity and more details than most people think about. Sometimes it isn't super relevant, and can be used to distract from the high level details, but it is still there. Nuance with racial disparity is keeping in mind that a lot of racism is implemented in different ways regionally, while still being racism.

So often nuance-enjoyers come off as effectively saying “what if we rape but only sometimes?” on the topic of whether rape should be a crime in society.

That isn't nuance. That is weaponized compromise.

The fiddly details about consent and coercion in relation to rape would be about nuance.