Arguing that it’s invincible to convince people at large to adopt tabs over spaces with good arguments is a ridiculous statement

I do actually think that it is very hard to convince basically every programmer of something, no matter how good arguments you have.

Also, without knowing much about the issue, it sounds a bit like the tooling for people using braille displays isn't very good and fixing that is maybe also worth advocating for, perhaps it's even a strategy for advocacy that is more effective?