Hell they'd do it to, they replaced copies of games like Twilight Princess and Super Paper Mario when people discovered save breaking bugs.
I guess that's my whole deal here: if there's an issue then yes it will get fixed, be it through a software update (this seems most likely based on what I'm hearing, apparently you can strengthen the signal through the firmware) or asking for a replacement joycon. Nintendo has a good history with fixing hardware and software problems pretty quickly, I don't know why a small few people are acting like this is such a big deal. Hell I know it won't be for any anyway because of how I have myself set up. I play games in such a way that I always ensure no interference of any kind.