My wife is Gen-X from eastern Europe (cold war era for those not getting the timeline). She was born left handed but that was considered to be such a bad thing that they forced her to use her right hand for everything. So now she has this mishmash where she does things she grew up with like using a fork, writing, etc. with her left hand, new things (teen+ years) like basketball with the left, and others like Tennis with both.

It isn’t that left handed people didn’t exist, its that they were “corrected”.