Depends on what you mean by "we".

Scientists have a good understanding of what the data actually is. The name isn't important. It doesn't throw them off any more than the up and down quarks do.

Non scientists... yeah, maybe. There's a good chance we might never even have heard about it by a duller name. People fixate on charismatic ideas, disproportionately to their relevance or to their understanding.

It is possible that it helps indirectly. Students sometimes get bitten by the bug of charismatic science, and go into the field. And funders may well be influenced as well. That extra attention could put us ahead of where we would be otherwise.

As far as I get, dark matter is much more than normal one. However, we don't know what are the exact interactions between dm particles and hence cannot predict the shapes they will take.

Personal theory: Possibly the Great Attractor has something to do with a very large collection of dark matter - potentially dark matter galaxies. Hard to say though until we figure out how to see that section of space.