Right-handed bias is so funny. While there definitely have been pretty bad bigotry against left-handed people, most of the time when I'm encountering it, it's very instructional cluelessness with comparatively little ill-will attached.
Like, there's a weird kind of purity to it, you basically look and act like any other person, just mirror-flipped and that's enough to just completely break their brain.
What prompted this observation was seeing a promo video for a notepad that flipped upwards and was for all intents and purposes completely ambidextrous, but because the person demoing it was left-handed there was a lot of a) people who just thought the video looked off somehow but couldnt quite place it or b) assuming that notepad could only be used by left-handed people. (again, it's a notepad, it's just a piece of paper, they don't make left-handed pieces of paper) and it was such a fascinating case study in bias.
It'd be interesting to show some of the people confused by this promo 12tone's videos and see what they make of them (https://www.youtube.com/@12tone/videos), it's a really funny special case cus they are writing left-handed but for legacy reasons, the intro to every video is right-handed and it can absolutely start bothering you if you notice it. I had to rewatch one of their videos multiple times just to make sure I wasn't misremembering.
About the worst comment I've ever gotten about my left-handedness is someone wondering if I was just doing it for attention which is a fascinating case study in its own right.
@Owlor What?! That's one of those where you just shake your head sadly and say "I am not able rightly to apprehend the kind of confusion of ideas that could provoke such a question." What sort of narcissitic projection could get someone believing people were spending years practicing ambidexterity just to impress them?! I already thought it sounded self-absorbed when people said that about people with dyed hair... and that's not even an affectation you'd have to *practice*. 
