I see this move towards redefining sexism and racism to be the prevalent form of negative sex or race based discrimination, instead of all forms of discrimination.
That's why I stated it is a semantic discussion.
On the one hand, I think this redefining is good. Because when we talk about the problems of racism and sexism, the prevalent form of negative discrimination (so in the west, racism by white people, and sexism by males) are what we tend to mean.
On the other hand, other forms of discrimination also happen, and we need words to describe them. Racism and sexism used to describe that, but by now such describing tends to feel bad. It tends to feel like drawing an equivalence between e.g. a white person not being able to use the N-word being 'just as bad' as the oppression faced by black people in America.
I feel we need separate words for both the systemic (non intentional) oppression of people by sex and gender. And discrimination based on sex and gender in general. Originally racism and sexism used to describe the latter. Slowly we are moving towards having it mean the former, without having new words for the latter. Ideally wish we had just come up with new words for the latter. But that would have lost some of the power that comes from calling someone a racist or a sexist.
In conclusion, semantics matter, and are hard.