It is quite possible for Gina Rodriguez to advocate for better Latinx representation without constantly evoking African American advances in a way that implies they're part of the problem. If she refuses to learn that, her cultural activism actually perpetuates the problem.
First of all, African Americans did not create the black-white binary that dominates racial ideology in the United States nor does that framework spare them from anti-Black racism.
Most generous interpretation of Gina's intention is she means, "Latinx want similar shots at success," that's still a problem. It presumes a lot of things that aren't true. One, that African Americans have "arrived" and racism doesn't remain a serious problem for them. Full stop