That is the theory from before they tested and found they could not meaningfully guide the dart once in flight and they would need the dart itself to be more steerable
This is false and not mentioned by your source.
citing unresolved problems with barrel life and a low rate of fire
Lol.

You were wrong about something. It's really not a big deal. It's worse to make stuff up to try to seem right and post "sources" that don't even mention what you're talking about.