But I don't get the notion that you have a moral obligation to protect other's pseudonymity in general. Especially when it's not patently obvious that they've taken steps to conceal it. I mean sure, I get that it can be done in harassing ways too. Randomly brining up someone's full name in a comment reply is probably not nice. But when writing a big piece on some fascinating persona it seems fine to me.
Also purely strategically speaking when your identity is elaborated on to cry "doxxing" only makes you look like you've actually done something wrong, have something to hide. If you don't want to own things you have written, best not write them in the first place.
It's almost as if people desire the ability to be a public figure without any of the downsides.