I've been reading "Cynical Theories" by Pluckrose and Lindsay which explains this whole thing as coming from a one-dimensional, activistized Postmodern framework. In this framework, society is a subtle network of power that creates oppressors and oppressed, sustained by "truth" created through language. There is no such thing as objective truth, so truth is a social construct created through language. But since the word "blind" is used by the default, in-power group, your claim to prefer "blind" is acquiescing to the oppressive in-power structure. So if they really buy into the framework, they cannot actually use the word you prefer, or they would be furthering the oppressive structure.

Ironically, intersectionality adds that truth is created by identity groups (e.g. "blind", "blind females", "blind black females", etc.), and cannot be truly known by people outside that identity group. So even by their own assumptions, your claims as a member of the blind identity group ought to trump their assertions. But, this is functionally a fundamentalist religion, and the assumptions are sacrosanct. (I am using "fundamentalist" here meaning a one-dimensional ideology that is non-negotiable, which is essentially how Christian fundamentalism, for example, currently operates.) You might be able to mess with the minds of cultural believers, though.

This absolutely has increased the distance between groups, because the real goal is not kindness but activism to disrupt entrenched power structures.