Fair enough. But it's murky. I mean, it's arguable that any discrimination based on existential stuff -- such as gender, "race" and disability -- is immoral. Because it's just who you are, not something that you've chosen, something that you're responsible for.
Also, when it's about stuff like housing and services, there's not much basis for discrimination. Except for providing access to those with disabilities. And that seems fair.
When it's about employment, even if there are data that might justify discrimination, it's all about statistical distributions for populations. So there's too much uncertainty when you apply it to individuals. And there's also the fact that untangling innate/genetic and developmental/sociological factors is impossible.
For health and life insurance, basing rates on age and preexisting conditions clearly makes economic sense. Older people will likely cost more than younger people. And people diagnosed with cancer etc will likely cost more than people generlly. But for health insurance, there are social justice arguments that discrimination is unfair.
For vehicle insurance, it's undeniable that young men have more accidents than young women, and middle-aged people generally. And that old people people also have more accidents. At least two factors distinguish that from health insurance. First, there's the sense that people can choose to drive more carefully, and have fewer accidents. Also, there's the argument that driving isn't as essential as medical care.