Use of "Karen" label to illegitamize opposing viewpoints.

There seems to be a growing trend of throwing out the "Karen" label when someone disagrees with another person's point of view, rather than engaging with ideas and having honest, rational conversations or accepting that someone having a different view of the world does not make them sad, a loser, unhappy with their life, etc. The object of using the "Karen" trope appears to be to silence dissent by focusing on a person's perceived character flaws, rather than engaging with the substance of their argument. We all know, I think, that Karens are generally people who fall back on their own sense of privilege when they feel irrationally threatened or misguidedly entitled, but the term seems to be morphing into an all-inclusive way to shut down dialogue if someone doesn't like what another person has to say, even if it is completely reasonable.

Do you think falling back on the Karen trope muffles honest dialogue or do you think it is a useful tool in discourse? Does it elevate conversation or simply make the person using it feel better about themselves by insulting someone else without actually engaging with their ideas?

Bonus question: it it a Karen move to throw out the Karen label in this manner? Is this Karen cannibalizing itself?