It’s not “uniquely identifiable”. What if someone else writes your information as their own?
Again, I feel like there is a lot of conjecturing when the best thing to do would be to get an actual lawyer to make a report indicating what about Lemmy today is in violation of the GDPR. For all the crying around it, I’d bet that the issues are not insurmountable, and I think that we should stick with common sense: those that care about actual privacy should not be using a social media platform anyway, and they should always be treating anything they put online as something that is never going to be deleted and available for any sufficiently motivated actor.