The nobles didn't need explanations to understand the issue. Khan wasn't the only Nognes who had made moves. Thomas had also increased his political activity, obviously trying to involve fellow powerful families to improve his position.
Thomas had even succeeded in a few instances, but the noble families had no real obligations toward one another. They could play both sides without earning any blame. Actually, the infighting benefited them since Khan and Thomas had to offer favorable deals to secure their support.
Khan was also aware of the issue, but his hands were tied. He had a good product but couldn't use it to rip off the nobles, not yet, at least. Khan needed their support more than their Credits, and the symphony soon told him he had succeeded.