I don't buy this. I've known a lot of people, especially from a south-east asian background, that are extremely reserved when it comes to self-advocacy wage-wise and still remain extremely strong and clear communicators in the areas that matter. Additionally various factors of neurodiversity bring this into an even worse light, being mildly Autistic can make this difficult to accomplish even if you're able to communicate well with the team on a day-by-day basis.
You’re right, being a bad negotiator does not always correlate to being a bad communicator. But being a good negotiator almost always correlates to being a good communicator.
I don't agree with this. I had a great salary negotiation, over the phone. It was all prepared, i had answers ready for me for the negotiation, prepared by my stepsister (who recently had a mission at a recruitment firm), she listened to the interviewer/manager, pointed me to the correct idea for negotiating, and i landed +60% of my old salary (loosing two vacation weeks, i only have 8 left, but still). Nothing to do with being a good communicator.
I did say “almost always”. Also you showed (somewhat morally ambiguous haha) problem solving and resourcing—two highly sought after skills.
Let’s also not discount the fact that negotiation is a skill itself, and you were learning from your stepsister who sounds like a skilled negotiator. If you had to negotiate another raise in-person I would bet you could think back to the cards and knock it out.